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$347+ Cheap flights from Seattle (SEA) to Bangkok

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Mar 18 — Mar 251
Tue 3/18
Tue 3/25
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Bangkok are usually found in February or March, booked 71 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Seattle to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bangkok (TH1). 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 13, 2025.

Round-trip from

$740
(Gurufare)

One-way from

$347
(Justfly.com)

Popular in

December

Cheapest in

February

Average price

$830
From Seattle/Tacoma Intl to Bangkok
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One-way flight from Seattle/Tacoma Intl to Bangkok
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Highest demand for flights based on searches. 1% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Seattle to Bangkok

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

This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:45 amSEA - BKK
1 stop38h 40mSingapore Airlines
Mon 11/178:00 pmBKK - SEA
1 stop26h 10mSingapore Airlines
Deal found 3/12$732
This Gurufare deal was found by Cheapflights users on 3/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1911:35 pmSEA - BKK
1 stop32h 50mPhilippine Airlines
Tue 10/76:40 pmBKK - SEA
1 stop38h 35mPhilippine Airlines
Deal found 3/13$740
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/211:10 amSEA - BKK
1 stop34h 15mChina Airlines
Mon 4/282:40 amBKK - SEA
1 stop30h 50mChina Airlines
Deal found 3/13$748
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/162:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Tue 5/131:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 3/12$756
This Gurufare deal was found by Cheapflights users on 3/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/254:45 pmSEA - BKK
1 stop22h 25mANA
Tue 4/159:35 amBKK - SEA
1 stop18h 50mANA
Deal found 3/13$784
This oojo deal was found by Cheapflights users on 3/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1512:50 pmSEA - BKK
1 stop34h 25mKorean Air
Thu 5/811:30 pmBKK - SEA
1 stop25h 10mKorean Air
Deal found 3/13$793
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/210:15 amSEA - BKK
1 stop19h 45mMultiple Airlines
Tue 9/96:40 pmBKK - SEA
1 stop38h 40mMultiple Airlines
Deal found 3/12$814
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:40 pmSEA - BKK
1 stop30h 10mQatar Airways
Mon 11/248:10 amBKK - SEA
1 stop42h 35mQatar Airways
Deal found 3/11$838
This United Airlines deal was found by Cheapflights users on 3/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/224:30 pmSEA - BKK
1 stop22h 05mUnited Airlines
Wed 10/89:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 3/13$844
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/151:05 amSEA - BKK
1 stop21h 30mSTARLUX Airlines
Thu 4/101:10 pmBKK - SEA
1 stop17h 00mSTARLUX Airlines
Deal found 3/12$853
This FlightHub deal was found by Cheapflights users on 3/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/411:30 pmSEA - BKK
1 stop20h 40mEVA Air
Mon 11/102:15 amBKK - SEA
1 stop30h 55mEVA Air
Deal found 3/13$858
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1811:35 amSEA - BKK
1 stop19h 55mDelta
Tue 4/19:40 pmBKK - SEA
1 stop29h 50mDelta
Deal found 3/12$888

Find flights from Seattle to Bangkok within your budget

Customize your flight search to find flights from Seattle to Bangkok 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 13, 2025.

Fly from

Seattle

Fly to

Bangkok

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/3

11:30 pm-12:15 pm

1 stop22h 45m

Bangkok Suvarnabhumi

Thu 9/18

6:40 pm-7:20 pm

1 stop38h 40m

$740

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/21

1:10 am-1:25 am

1 stop34h 15m

Bangkok Suvarnabhumi

Mon 4/28

2:40 am-7:30 pm

1 stop30h 50m

$748

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 4/16

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 5/13

1:20 am-12:30 pm

1 stop25h 10m

$756

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/24

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Wed 5/7

11:30 pm-10:40 am

1 stop25h 10m

$780

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 9/6

10:15 am-8:35 am

1 stop32h 20m

Bangkok Suvarnabhumi

Sat 9/27

10:50 am-8:45 am

1 stop35h 55m

$782

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 3/25

4:45 pm-5:10 am

1 stop22h 25m

Bangkok Suvarnabhumi

Tue 4/15

9:35 am-2:25 pm

1 stop18h 50m

$784

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/2

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Tue 9/9

6:40 pm-7:20 pm

1 stop38h 40m

$814

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/20

12:40 pm-1:15 pm

1 stop34h 35m

Bangkok Suvarnabhumi

Thu 5/1

11:30 pm-1:35 pm

1 stop28h 05m

$827

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 5/12

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 5/22

9:35 am-2:25 pm

1 stop18h 50m

$844

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/31

1:15 am-4:40 pm

1 stop25h 25m

Bangkok Suvarnabhumi

Wed 4/9

1:10 pm-4:10 pm

1 stop17h 00m

$853

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 34 results
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Best time to book a flight from Seattle to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from Seattle 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 Seattle to Bangkok

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

How far ahead should I book a flight from Seattle to Bangkok?

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

To ensure you get the cheapest price possible for a flight from Seattle to Bangkok, you should look to book at least 71 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 Seattle to Bangkok?

Currently, February is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $968). Flying from Seattle to Bangkok in June is currently the most expensive (average of $1,577). 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 SEA to BKK?

Find hourly flight availability from Seattle to Bangkok. 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.

A simple way to save on the total cost of your ticket is to fly from Seattle to Bangkok in the morning. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Seattle to Bangkok?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Bangkok. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Bangkok flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Bangkok by month

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

In terms of precipitation, rainfall in Bangkok ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

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

If weather is an important factor for your trip to Bangkok, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated March 13, 2025.
Read through reviews of airlines operating flights from Seattle to Bangkok, such as STARLUX Airlines, EVA Air and Korean Air. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

STARLUX Airlines
9.1
Wonderful
141 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

EVA Air
8.4
Very good
1,181 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

Korean Air
8.4
Very good
1,047 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

ANA
8.4
Very good
829 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

China Airlines
8.2
Very good
723 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Comfort

9.0

Crew

9.3

Food

9.0

Boarding

9.1

Entertainment

9.1

Overall

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

Related info for your journey

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

  • What airport do you fly from for flights from Seattle to Bangkok?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Bangkok. 18 airlines have flights from Seattle/Tacoma Intl to Bangkok on a regular basis. Booking flights from Seattle/Tacoma Intl to Bangkok should not be difficult; the airport handles an average of 0 outbound flights to Bangkok per day.

  • What are the cheapest airlines flying from Seattle to Bangkok round-trip?

    Philippine Airlines, at $740, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include China Airlines and Asiana Airlines. Philippine Airlines is 27% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Bangkok one-way?

    $347 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on Qatar Airways and China Airlines, with prices starting from $411 and $428, respectively.

  • Where are the most common layover locations when flying from Seattle to Bangkok?

    The most popular layover on flights from Seattle to Bangkok is Taipei City. Taipei City is followed by Seoul in terms of the most popular layover location on flights from Seattle to Bangkok. Tokyo ranks third in terms of the most popular layover location on Seattle to Bangkok flights.

  • What are some popular things to do or see while on a layover in Taipei City?

    Taipei 101, Shilin Night Market, and Raohe Street Night Market are currently the most popular points of interest in Taipei City at the moment. Those on a layover in Taipei City interested in visiting Taipei 101, Shilin Night Market, or Raohe Street Night Market can do so by traveling 21.0 mi, 18.3 mi, and 21.6 mi, respectively from Taipei City Taiwan Taoyuan Intl. Travelers can book a car rental at Taipei City Taiwan Taoyuan Intl for about $84 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Seoul?

    The majority of Seoul visitors spend their time at Myeongdong Cathedral, Dongdaemun Market, and Lotte World. Myeongdong Cathedral, Dongdaemun Market, and Lotte World can be accessed by traveling approximately 30.4 mi, 31.6 mi, and 35.7 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $58 per day.

  • What are points of interest worth seeing during a layover in Tokyo?

    Most Tokyo visitors opt to spend their time at Akihabara Electric Town, Roppongi Hills, and Tsukiji Outer Market. Akihabara Electric Town, Roppongi Hills and Tsukiji Outer Market are located about 10.3 mi, 8.5 mi, and 7.9 mi, respectively from Tokyo Haneda if you are interested in checking them out. Those on a layover in Tokyo in need of a rental car can book one at Tokyo Haneda for about $65.

  • Where are the least popular layover locations for Seattle to Bangkok flights?

    Seattle to Bangkok flights have a layover in Istanbul the least frequently. Seattle to Bangkok flights stopping in San Francisco are the next rarest. Singapore follows San Francisco in terms of the least frequent layover locations on Seattle to Bangkok flights.

  • Can I find deals for flights from Seattle to Bangkok that include hotel bookings?

    Yes. In addition to deals on Seattle to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Bangkok?

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

  • Can I find deals for business class flights from Seattle to Bangkok?

    Yes. Cheapflights offers flight deals from Seattle to Bangkok 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 Seattle to Bangkok?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $968). Flying from Seattle to Bangkok in June is currently the most expensive (average of $1,577). 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

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Top 10 airlines flying from Seattle to Bangkok

Discover the top 10 airlines that operate flights from Seattle to Bangkok. 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 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$622Average$829FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$636Average$789FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$700Average$897FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$761FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$754Average$852FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
DeltaCheapest$759Average$1,063FlexibilityNo cancel feeOn-timeN/A
ANACheapest$760Average$937FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,080FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$961FlexibilityNo cancel feeOn-time69%
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