How popular is this Ontario to Las Vegas flight route?

The Ontario to Las Vegas Harry Reid Intl flight path was viewed by 398 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines flying from Ontario to Las Vegas round-trip?

Currently priced at $43, Frontier will fly you from Ontario to Las Vegas and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and American Airlines - these airlines can fly you to your destination from $97 and $199, respectively. Users have found that Frontier is 53% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Ontario to Las Vegas one-way?

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $36. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Ontario to Las Vegas for a low price.

What are the cheapest flights from Ontario to Las Vegas?

Looking for the cheapest flight from Ontario to Las Vegas? While on average our users pay $109, our data indicates the cheapest price to be $22. The most popular route (Ontario - Las Vegas Harry Reid Intl), is priced around $43.

What are the most popular airlines that fly from Ontario to Las Vegas?

Consider American Airlines, Frontier or Spirit Airlines when booking your flight. These represent the most popular airlines when flying from Ontario to Las Vegas.

What is the cheapest day to fly round-trip from Ontario to Las Vegas?

It’s generally more expensive to depart on a Saturday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Ontario to Las Vegas?

Users have found that booking a flight from Ontario to Las Vegas at least 31 days early can save you up to 91% on average compared to booking a flight this week. If booking 31 days before your flight isn’t an option for you, users have found flights from Ontario to Las Vegas for as little as $72 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $132 for flights departing within the next 3 days.

What is the cheapest month to fly from Ontario to Las Vegas?

Our data shows that September tends to be the cheapest month to fly to Las Vegas from Ontario. Users have commonly found prices around $104 for the month, but tickets can be as low as $34. Due to multiple factors, prepare for potentially higher prices in December.

Most accurate provider : When it comes to deals on Ontario-Las Vegas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Las Vegas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Las Vegas flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Las Vegas flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Las Vegas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airports do I use to fly from Ontario to Las Vegas?

Las Vegas Harry Reid Intl is the airport most travelers will use when flying to Las Vegas from Ontario. Booking flights from Ontario (ONT) to Harry Reid Intl (LAS) should be relatively easy as there are 4 daily flights to Las Vegas from 4 different airlines. 1h 00m is how long a flight from Ontario to Las Vegas Harry Reid Intl will take if you book a nonstop flight.

Can I find deals for flights from Ontario to Las Vegas that include hotel bookings?

Yes. In addition to deals on Ontario to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Las Vegas?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Las Vegas.

Can I find deals for business class flights from Ontario to Las Vegas?

Yes. Cheapflights offers flight deals from Ontario to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$36+ Flights from Ontario to Las Vegas

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to Las Vegas with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Ontario to Las Vegas Harry Reid Intl are usually found in April or October, booked 89 days in advance, depart on a Sunday or Monday and return on a Tuesday

Cheap flight deals from Ontario to Las Vegas

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$43 (Cheapflightsfares)
One-way from	$36 (Kiwi.com)
Popular in	March
Cheapest in	April
Average price	$104
Good round-trip deal	$84 or less
Good one-way deal	$49 or less

Provider with most accurate pricing for Ontario-Las Vegas Harry Reid Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Las Vegas Harry Reid Intl flights.

Search Deals

From Ontario to Las Vegas Harry Reid Intl

Search Deals

One-way flight from Ontario to Las Vegas Harry Reid Intl

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($1 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($2 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from Ontario to Las Vegas Harry Reid Intl.

Search Deals

Price to beat on a one-way flight from Ontario to Las Vegas Harry Reid Intl.

Search Deals

Find flight deals from Ontario to Las Vegas

Cheapest flights from Ontario to Las Vegas
Explore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2025.

Wed 4/92:43 pmONT - LAS

Nonstop1h 10mFrontier

Wed 4/97:15 pmLAS - ONT

Nonstop1h 04mFrontier

Deal found 3/11

$43

Wed 4/911:00 amONT - LAS

2 stops5h 15mSouthwest

Wed 4/1612:55 pmLAS - ONT

Nonstop1h 05mSouthwest

Deal found 3/12

$112

Best flights from Ontario to Las Vegas
Discover carefully curated flight deals from Ontario to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 13, 2025.

Wed 4/92:43 pmONT - LAS

Nonstop1h 10mFrontier

Wed 4/97:15 pmLAS - ONT

Nonstop1h 04mFrontier

Deal found 3/11

$43

Tue 5/1312:45 pmONT - LAS

Nonstop1h 05mSouthwest

Tue 5/138:45 pmLAS - ONT

Nonstop1h 00mSouthwest

Deal found 3/12

$97

Wed 4/237:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Sat 4/266:00 amLAS - ONT

1 stop5h 59mAmerican Airlines

Deal found 3/12

$199

Last-minute flights from Ontario to Las Vegas
Discover last-minute flight deals from Ontario to Las Vegas. Data last updated March 13, 2025 and is based on user searches.

Mon 3/176:00 amONT - LAS

2 stops9h 36mMultiple Airlines

Mon 3/177:08 pmLAS - ONT

2 stops14h 46mMultiple Airlines

Deal found 3/12

$1,001

Tue 3/182:43 pmONT - LAS

Nonstop1h 15mFrontier

Sun 3/236:20 amLAS - ONT

Nonstop1h 06mFrontier

Deal found 3/12

$63

Tue 3/1811:45 amONT - LAS

1 stop9h 42mAlaska Airlines

Tue 4/110:37 amLAS - ONT

1 stop7h 46mAlaska Airlines

Deal found 3/11

$539

Tue 3/186:10 amONT - LAS

1 stop6h 12mAmerican Airlines

Tue 3/181:23 pmLAS - ONT

1 stop5h 10mAmerican Airlines

Deal found 3/12

$561

Sat 3/223:20 pmONT - LAS

2 stops6h 25mSouthwest

Tue 3/259:35 pmLAS - ONT

Nonstop1h 05mSouthwest

Deal found 3/11

$285

Sat 3/2210:38 amONT - LAS

1 stop10h 09mUnited Airlines

Sat 4/59:55 amLAS - ONT

1 stop8h 01mUnited Airlines

Deal found 3/12

$498

Wed 4/92:43 pmONT - LAS

Nonstop1h 10mFrontier

Wed 4/97:15 pmLAS - ONT

Nonstop1h 04mFrontier

Deal found 3/11

$43

Wed 4/911:00 amONT - LAS

2 stops5h 15mSouthwest

Wed 4/1612:55 pmLAS - ONT

Nonstop1h 05mSouthwest

Deal found 3/12

$112

Fri 4/117:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Sat 4/127:00 amLAS - ONT

1 stop4h 59mAmerican Airlines

Deal found 3/12

$234

One-way flights from Ontario to Las Vegas
Search for one-way flight options from Ontario to Las Vegas. Find affordable one-way fares based on user searches. Data last updated March 13, 2025.

Sat 4/2610:17 pmONT - LAS

Nonstop1h 11mFrontier

Deal found 3/12

$36

Tue 4/15:00 pmONT - LAS

2 stops5h 15mSouthwest

Deal found 3/12

$64

Wed 4/97:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Deal found 3/12

$99

Wed 5/77:00 amONT - LAS

1 stop12h 56mAlaska Airlines

Deal found 3/12

$156

Tue 5/276:41 pmONT - LAS

2 stops14h 03mUnited Airlines

Deal found 3/12

$234

Sun 8/246:00 amONT - LAS

2 stops11h 09mMultiple Airlines

Deal found 3/11

$402

Find flights from Ontario to Las Vegas within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 4/9

2:43 pm-3:53 pm

Nonstop1h 10m

Las Vegas Harry Reid Intl

Wed 4/9

7:15 pm-8:19 pm

Nonstop1h 04m

$43

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 5/13

12:45 pm-1:50 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Tue 5/13

8:45 pm-9:45 pm

Nonstop1h 00m

$97

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 4/23

7:25 pm-10:38 pm

1 stop3h 13m

Las Vegas Harry Reid Intl

Sat 4/26

6:00 am-11:59 am

1 stop5h 59m

$199

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 4/26

10:17 pm-11:28 pm

Nonstop1h 11m

$36

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 4/1

5:00 pm-10:15 pm

2 stops5h 15m

$64

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 4/9

7:25 pm-10:38 pm

1 stop3h 13m

$99

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 5/7

7:00 am-7:56 pm

1 stop12h 56m

$156

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 5/27

6:41 pm-8:44 am

2 stops14h 03m

$234

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 8/24

6:00 am-5:09 pm

2 stops11h 09m

$402

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Compare providers for flights from Ontario to Las Vegas

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Las Vegas in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 stars
CheapOair	Price Accuracy1 star	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*3 stars
Trip.com	Price Accuracy1 star	Trust Score*3 stars
Flightnetwork	Price Accuracy2 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Las Vegas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Las Vegas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Las Vegas flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Las Vegas flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Las Vegas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Ontario to Las Vegas flights

Find out what our experts recommend to make the most of your Ontario to Las Vegas trip

Airlines

Frontier

Frontier offers low fares, but remember to factor in extra charges for a true cost comparison.

Consider extra comfort seats for more legroom on this short flight.

Read more about Frontierby Marisa Garcia

Southwest

Enjoy free snacks and non-alcoholic drinks on board, enhancing your short flight experience.

Two free checked bags included, ideal for travelers with extra luggage needs.

Read more about Southwestby Marisa Garcia

Our travel experts

Marisa Garcia

Expert on Frontier and Southwest

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.

Best time to book a flight from Ontario to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Ontario with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Las Vegas

Get recent, data-driven insights about flights from Ontario to Las Vegas including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to Las Vegas?

The price you pay for your flight from Ontario to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ontario to Las Vegas?

Currently, August is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $198). Flying from Ontario to Las Vegas in March is currently the most expensive (average of $269). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to LAS?

A simple way to save on the total cost of your ticket is to fly from Ontario to Las Vegas at noon. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Ontario to Las Vegas?

Travelers seeking maximum savings on their Ontario to Las Vegas flight should consider departing on Monday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Las Vegas by month

In terms of precipitation, rainfall in Las Vegas ranges from 0.1 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. May is typically the driest time to visit Las Vegas when rainfall is around 0.1 in.

Temperature in Las Vegas by month

If weather is an important factor for your trip to Las Vegas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Las Vegas

Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and United Airlines from Ontario to Las Vegas to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest

8.1

Very good

4,291 reviews

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines

8.0

Very good

9,734 reviews

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines

7.4

Good

8,625 reviews

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Frontier

6.0

Okay

3,293 reviews

Southwest

8.1

Very good

4,291 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

What airports do I use to fly from Ontario to Las Vegas?
Las Vegas Harry Reid Intl is the airport most travelers will use when flying to Las Vegas from Ontario. Booking flights from Ontario (ONT) to Harry Reid Intl (LAS) should be relatively easy as there are 4 daily flights to Las Vegas from 4 different airlines. 1h 00m is how long a flight from Ontario to Las Vegas Harry Reid Intl will take if you book a nonstop flight.
How popular is this Ontario to Las Vegas flight route?
The Ontario to Las Vegas Harry Reid Intl flight path was viewed by 398 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines flying from Ontario to Las Vegas round-trip?
Currently priced at $43, Frontier will fly you from Ontario to Las Vegas and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and American Airlines - these airlines can fly you to your destination from $97 and $199, respectively. Users have found that Frontier is 53% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Ontario to Las Vegas one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $36. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Ontario to Las Vegas for a low price.
What are the cheapest flights from Ontario to Las Vegas?
Looking for the cheapest flight from Ontario to Las Vegas? While on average our users pay $109, our data indicates the cheapest price to be $22. The most popular route (Ontario - Las Vegas Harry Reid Intl), is priced around $43.
Can I find deals for flights from Ontario to Las Vegas that include hotel bookings?
Yes. In addition to deals on Ontario to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Las Vegas?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Las Vegas.
Can I find deals for business class flights from Ontario to Las Vegas?
Yes. Cheapflights offers flight deals from Ontario to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ontario to Las Vegas?
Currently, August is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $198). Flying from Ontario to Las Vegas in March is currently the most expensive (average of $269). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Henderson

Paradise

North Las Vegas

Sunrise Manor

Winchester

Kingman

Primm

Mesquite

Needles

Mount Charleston

Pahrump

Boulder City

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Las Vegas

Los Angeles to Las Vegas flights

Santa Ana to Las Vegas flights

San Francisco to Las Vegas flights

Burbank to Las Vegas flights

San Jose to Las Vegas flights

Oakland to Las Vegas flights

Sacramento to Las Vegas flights

San Diego to Las Vegas flights

Los Angeles to Reno flights

Fresno to Las Vegas flights

Stockton to Las Vegas flights

Santa Rosa to Las Vegas flights

Ontario to Reno flights

Reno to Las Vegas flights

Burbank to Reno flights

San Diego to Reno flights

Long Beach to Las Vegas flights

Las Vegas to Reno flights

Palm Springs to Las Vegas flights

Santa Ana to Reno flights

San Francisco to Reno flights

San Jose to Reno flights

Long Beach to Reno flights

Monterey to Las Vegas flights

San Luis Obispo to Las Vegas flights

Santa Barbara to Las Vegas flights

Oakland to Reno flights

Medford to Las Vegas flights

Palm Springs to Reno flights

Sacramento to Reno flights

Santa Monica to Las Vegas flights

Fresno to Reno flights

Redding to Las Vegas flights

Bakersfield to Las Vegas flights

Santa Barbara to Reno flights

Medford to Reno flights

Santa Maria to Las Vegas flights

San Luis Obispo to Reno flights

San Francisco to Twin Falls flights

Monterey to Reno flights

Bakersfield to Reno flights

Arcata to Las Vegas flights

Yuma to Las Vegas flights

Ontario to Twin Falls flights

Santa Rosa to Reno flights

Sacramento to Twin Falls flights

Los Angeles to Twin Falls flights

Oakland to Twin Falls flights

Santa Ana to Twin Falls flights

Complete your trip

Las Vegas car rentals

Las Vegas Harry Reid Intl Airport car rentals

Bullhead City Laughlin Bullhead Airport car rentals

Reno car rentals

Laughlin car rentals

The Strip car rentals

Downtown car rentals

Summerlin car rentals

Arts District car rentals

Centennial Hills car rentals

West of The Strip car rentals

South of The Strip car rentals

Other flights to Las Vegas

Top 4 airlines flying from Ontario to Las Vegas

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$26	Average$72	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$40	Average$89	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$132	Average$249	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$199	Average$479	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$36+ Cheap flights from Ontario to Las Vegas (ONT - LAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Las Vegas with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

The best prices from Ontario to Las Vegas Harry Reid Intl are usually found in April or October, booked 89 days in advance, depart on a Sunday or Monday and return on a Tuesday

Cheap flight deals from Ontario to Las Vegas

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to Las Vegas

Cheapest flights from Ontario to Las VegasExplore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2025.

Explore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2025.

Find flights from Ontario to Las Vegas within your budget

Compare providers for flights from Ontario to Las Vegas

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Las Vegas in March.

The best insider tips for Ontario to Las Vegas flights

Find out what our experts recommend to make the most of your Ontario to Las Vegas trip

Airlines

Frontier

Southwest

Our travel experts

Best time to book a flight from Ontario to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Ontario with our price prediction graph.

Travel insights for flights from Ontario to Las Vegas

Get recent, data-driven insights about flights from Ontario to Las Vegas including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to Las Vegas?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Las Vegas. Price data was last updated on March 7, 2025.

What is the cheapest month to book a flight from Ontario to Las Vegas?

What is the cheapest time of day to fly from ONT to LAS?

Find hourly flight availability from Ontario to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 13, 2025.

What is the cheapest day to fly from Ontario to Las Vegas?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Las Vegas. Price data was last updated on March 9, 2025.

Rainfall in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average rainfall totals by month.

Temperature in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average temperature totals by month.

Reviews of airlines servicing Las Vegas

Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and United Airlines from Ontario to Las Vegas to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Ontario to Las Vegas?

How popular is this Ontario to Las Vegas flight route?

What are the cheapest airlines flying from Ontario to Las Vegas round-trip?

What are the cheapest airlines to fly from Ontario to Las Vegas one-way?

What are the cheapest flights from Ontario to Las Vegas?

Can I find deals for flights from Ontario to Las Vegas that include hotel bookings?

How can I find direct flights from Ontario to Las Vegas?

Can I find deals for business class flights from Ontario to Las Vegas?

What is the cheapest month to book a flight from Ontario to Las Vegas?

Traveling to a place near Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Las Vegas

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Ontario to Las Vegas

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario to Las Vegas
Explore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2025.