HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$28+ Cheap flights from Las Vegas to Ontario (LAS - ONT)

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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ONT
Mar 17 — Mar 241
Mon 3/17
Mon 3/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Las Vegas to Ontario 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 Las Vegas Harry Reid Intl to Ontario are usually found in September or April, booked 46 days in advance, depart on a Tuesday or Thursday and return on a Sunday

Cheap flight deals from Las Vegas to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$48
(CheapOair)

One-way from

$28
(Mytrip)

Popular in

March

Cheapest in

September

Average price

$87

Good round-trip deal

$51 or less

Good one-way deal

$40 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Ontario flights.
Search Deals
From Las Vegas Harry Reid Intl to Ontario
Search Deals
One-way flight from Las Vegas Harry Reid Intl to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% 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 Las Vegas Harry Reid Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Ontario.
Search Deals

Find flight deals from Las Vegas to Ontario

Cheapest flights from Las Vegas to Ontario
Explore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 12, 2025.

This CheapOair deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/91:53 pmLAS - ONT
Nonstop1h 11mFrontier
Wed 4/99:09 pmONT - LAS
Nonstop1h 14mFrontier
Deal found 3/11$48
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/295:05 amLAS - ONT
1 stop5h 10mSouthwest
Sat 3/295:05 pmONT - LAS
Nonstop1h 05mSouthwest
Deal found 3/12$137
This American Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/912:29 pmLAS - ONT
1 stop3h 30mAmerican Airlines
Wed 4/97:25 pmONT - LAS
1 stop3h 13mAmerican Airlines
Deal found 3/12$193

Find flights from Las Vegas to Ontario within your budget

Customize your flight search to find flights from Las Vegas to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 12, 2025.

Fly from

Las Vegas

Fly to

Ontario

Route

Depart

Return

Price

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 4/9

1:53 pm-3:04 pm

Nonstop1h 11m

Ontario

Wed 4/9

9:09 pm-10:23 pm

Nonstop1h 14m

$48

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 4/30

9:55 am-11:00 am

Nonstop1h 05m

Ontario

Wed 4/30

8:45 pm-9:50 pm

Nonstop1h 05m

$97

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 4/9

12:29 pm-3:59 pm

1 stop3h 30m

Ontario

Wed 4/9

7:25 pm-10:38 pm

1 stop3h 13m

$193

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 4/9

6:00 am-11:59 pm

1 stop17h 59m

Ontario

Wed 4/16

6:00 am-8:05 pm

2 stops14h 05m

$366

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 5/2

4:08 pm-12:24 pm

3 stops20h 16m

Ontario

Sun 5/4

6:00 am-12:59 am

1 stop18h 59m

$424

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Wed 4/30

8:49 am-9:53 am

Nonstop1h 04m

$28

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 4/15

10:40 am-3:35 pm

2 stops4h 55m

$64

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 4/8

12:29 pm-3:59 pm

1 stop3h 30m

$100

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 5/6

7:20 am-8:19 pm

1 stop12h 59m

$156

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 5/6

4:08 pm-2:25 pm

3 stops22h 17m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 11 results
1
2

Compare providers for flights from Las Vegas to Ontario

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 Las Vegas to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust 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 Las Vegas-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Las Vegas-Ontario 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 Las Vegas-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Las Vegas to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Las Vegas 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 Las Vegas to Ontario

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

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

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

To ensure you get the cheapest price possible for a flight from Las Vegas to Ontario, you should look to book at least 38 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $246). Flying from Las Vegas to Ontario in March is currently the most expensive (average of $321). 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 LAS to ONT?

Find hourly flight availability from Las Vegas to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 12, 2025.

When flying from Las Vegas to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 31% versus a flight in the afternoon.

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

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

Travelers seeking maximum savings on their Las Vegas to Ontario flight should consider departing on Tuesday at noon 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.

Weekly flight availability from Las Vegas to Ontario

Explore weekly flight availability from Las Vegas to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 12, 2025.

The most flights from LAS to ONT are scheduled on a Friday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 12, 2025.
To help decide which airline to fly from Las Vegas to Ontario, see what other customers have to say about Southwest, Alaska Airlines and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

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
4,295 reviews
Southwest
8.1
Very good
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

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
9,735 reviews
Southwest
8.1
Very good
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

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
8,621 reviews
Southwest
8.1
Very good
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

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

JetBlue
7.3
Good
2,956 reviews
Southwest
8.1
Very good
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

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
4,295 reviews

Food

7.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

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

Find useful and relevant information for your journey from Las Vegas to Ontario. 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 Las Vegas to Ontario?

    If you wish to fly to Ontario from Las Vegas, then you need to book flights from Las Vegas Harry Reid Intl to Ontario. There are 4 flights from Harry Reid Intl (LAS) to Ontario (ONT) per day to choose from. Flights to Ontario from Harry Reid Intl are available from 3 different airlines, which means you should have some options if you want to compare airfare deals. 1h 04m is how long a nonstop flight from Las Vegas to Ontario typically takes.

  • How popular is this Las Vegas to Ontario flight route?

    Within the past month, 96 users have taken a look at flights from Las Vegas Harry Reid Intl to Ontario.

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

    Cheapflights users have booked flights from Las Vegas to Ontario round-trip from $48. Other airlines that can offer you cheap pricing are Southwest, from $97, and American Airlines, from $193. You may be able to fly from Las Vegas to Ontario for 29% less than the average price by searching for these airlines.

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

    The cheapest airlines for a one-way flight from Las Vegas to Ontario are Frontier ($28), Southwest ($64), and American Airlines ($100).

  • What are the cheapest flights from Las Vegas to Ontario?

    On average you can expect to pay $81 for a flight from Las Vegas to Ontario. The cheapest flight overall is $19 while the most popular route, (Las Vegas Harry Reid Intl - Ontario) is currently priced at $48.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Las Vegas to Ontario 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 Las Vegas to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $246). Flying from Las Vegas to Ontario in March is currently the most expensive (average of $321). 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

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 Las Vegas to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Las Vegas to Los Angeles flights
Las Vegas to Santa Ana flights
Reno to Los Angeles flights
Las Vegas to San Francisco flights
Las Vegas to Burbank flights
Reno to Las Vegas flights
Las Vegas to San Diego flights
Las Vegas to San Jose flights
Las Vegas to Reno flights
Las Vegas to Oakland flights
Reno to San Diego flights
Reno to San Francisco flights
Reno to Ontario flights
Reno to Burbank flights
Las Vegas to Sacramento flights
Reno to San Jose flights
Las Vegas to Palm Springs flights
Reno to Santa Ana flights
Las Vegas to San Luis Obispo flights
Reno to Palm Springs flights
Las Vegas to Long Beach flights
Las Vegas to Fresno flights
Reno to Oakland flights
Las Vegas to Stockton flights
Reno to Fresno flights
Las Vegas to Santa Barbara flights
Las Vegas to Santa Rosa flights
Reno to Long Beach flights
Reno to San Luis Obispo flights
Las Vegas to Redding flights
Las Vegas to Monterey flights
Reno to Monterey flights
Las Vegas to Tijuana flights
Las Vegas to Medford flights
Reno to Santa Barbara flights
Las Vegas to Arcata flights
Reno to Sacramento flights
Twin Falls to Las Vegas flights
Las Vegas to Yuma flights
Reno to Medford flights
Las Vegas to Merced flights
Las Vegas to Bullhead City flights
Twin Falls to Los Angeles flights
Twin Falls to San Diego flights
Las Vegas to Mammoth Lakes flights
Twin Falls to Long Beach flights
Elko to San Diego flights
Reno to Yuma flights
Twin Falls to Burbank flights

Top 3 airlines flying from Las Vegas to Ontario

Discover the top 3 airlines that operate flights from Las Vegas to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$26Average$51FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$68FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$117Average$232FlexibilityNo cancel feeOn-time63%
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.