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$358+ Cheap flights from Washington 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Dec 16 — Dec 231
Tue 12/16
Tue 12/23
1 adult, Economy
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Cheap flight deals from Washington to Bangkok

Keep the following information in mind while searching for Washington to Bangkok flight deals. Data was last updated November 16, 2025.

Round-trip from

$680
(CrystalTravel)

One-way from

$358
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$813
From Washington to Bangkok
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One-way flight from Washington to Bangkok
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Highest demand for flights based on searches. 15% potential increase in price ($160 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 November 2025
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Find flight deals from Washington to Bangkok

Cheapest flights from Washington to Bangkok
Explore the most affordable flight options available from Washington to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 16, 2025.

This CrystalTravel deal was found by Cheapflights users on 11/15. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:40 pmSEA - BKK
1 stop22h 30mANA
Wed 1/217:10 amBKK - SEA
1 stop21h 10mANA
Deal found 11/15$680
This KAYAK deal was found by Cheapflights users on 11/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:30 pmSEA - BKK
1 stop29h 20mPhilippine Airlines
Tue 1/271:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/15$685
This SmartFares deal was found by Cheapflights users on 11/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:00 amSEA - BKK
1 stop22h 25mHainan Airlines
Mon 12/81:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/16$686
This iWofly deal was found by Cheapflights users on 11/16. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:00 amSEA - BKK
1 stop22h 45mKorean Air
Mon 12/1511:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 11/16$687
This iWofly deal was found by Cheapflights users on 11/15. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:59 pmSEA - BKK
2 stops37h 46mKorean Air
Sun 12/1411:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 11/15$693
This oojo deal was found by Cheapflights users on 11/15. 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 11/1810:00 amSEA - BKK
1 stop22h 25mHainan Airlines
Mon 1/121:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/15$694
This Asiana Airlines deal was found by Cheapflights users on 11/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Thu 1/2211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/15$696
This Korean Air deal was found by Cheapflights users on 11/15. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:00 amSEA - BKK
1 stop22h 55mKorean Air
Mon 1/269:30 pmBKK - SEA
1 stop26h 30mKorean Air
Deal found 11/15$699
This KAYAK deal was found by Cheapflights users on 11/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/269:30 pmSEA - BKK
1 stop29h 20mPhilippine Airlines
Tue 1/271:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/15$702
This Asiana Airlines deal was found by Cheapflights users on 11/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Tue 1/2711:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/15$704
This Korean Air deal was found by Cheapflights users on 11/15. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2611:00 amSEA - BKK
1 stop22h 55mKorean Air
Sun 1/252:05 amBKK - SEA
1 stop21h 55mKorean Air
Deal found 11/15$707
This Mytrip deal was found by Cheapflights users on 11/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:10 amSEA - DMK
2 stops33h 25mMultiple Airlines
Wed 12/105:50 pmDMK - SEA
2 stops35h 05mMultiple Airlines
Deal found 11/14$826

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 November 16, 2025.
Use the filters below to find and compare flights from Washington to Bangkok that are best for you.

Fly from

Washington

Fly to

Bangkok

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/8

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Sat 2/21

12:20 pm-1:55 pm

1 stop16h 35m

$696

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 12/3

7:10 am-12:55 am

2 stops26h 45m

Bangkok Suvarnabhumi

Sun 12/14

9:30 pm-9:00 am

1 stop26h 30m

$721

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 11/24

3:45 pm-12:45 am

2 stops42h 00m

Bangkok Suvarnabhumi

Sun 12/21

12:55 am-9:00 am

1 stop23h 05m

$721

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/31

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Fri 2/6

2:05 am-9:00 am

1 stop21h 55m

$732

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/7

11:17 am-1:25 pm

2 stops35h 08m

Bangkok Suvarnabhumi

Sat 2/28

12:55 am-9:00 am

1 stop23h 05m

$737

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/23

7:59 pm-12:45 am

2 stops37h 46m

Bangkok Suvarnabhumi

Sat 12/6

2:05 am-9:00 am

1 stop21h 55m

$737

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/16

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Sat 1/31

9:30 pm-9:00 am

1 stop26h 30m

$737

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/9

7:15 am-12:45 am

2 stops26h 30m

Bangkok Suvarnabhumi

Fri 1/30

2:05 am-9:00 am

1 stop21h 55m

$737

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 11/28

7:59 pm-12:45 am

2 stops37h 46m

Bangkok Suvarnabhumi

Sat 12/13

12:55 am-9:00 am

1 stop23h 05m

$737

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

7:15 am-12:45 am

2 stops26h 30m

Bangkok Suvarnabhumi

Tue 3/3

9:40 am-8:37 pm

2 stops25h 57m

$748

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Bangkok

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

Cheapflights Insights

Everything you need to know about your flight from Washington to Bangkok

What is the cheapest month to book a flight from State of Washington to Bangkok?

Currently, February is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $528). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $993). 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 WA to BKK?

Find hourly flight availability from Washington 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 November 16, 2025.

One of the essential ways to save on airfare from State of Washington to Bangkok is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 20% on airfare.

What is the cheapest day to fly from State of Washington to Bangkok?

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

Travelers seeking maximum savings on their State of Washington to Bangkok flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

  • How long is the flight from State of Washington to Bangkok?

    Airlines like Asiana Airlines, Korean Air, and China Airlines fly from State of Washington to Bangkok in about 26h 45m. The time it takes to get you to your destination can typically vary by up to 25h 30m. State of Washington and Bangkok are separated by a distance of 7443 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Bangkok one-way?

    The cheapest airline one-way is Korean Air, with whom users have recently found tickets for as low as $374. However, be on the lookout for offers from United Airlines and Philippine Airlines, as they are both options that can get you from State of Washington to Bangkok for a low price.

  • What are the most popular routes from State of Washington to Bangkok?

    The most popular flight routes from State of Washington to Bangkok are Seattle/Tacoma Intl - Bangkok Suvarnabhumi, Portland - Bangkok Suvarnabhumi and Seattle/Tacoma Intl - Bangkok Don Mueang Intl.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Bangkok?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $528). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $993). 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

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Alternative routes for Washington to Bangkok

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to Bangkok

Discover the top 10 airlines that operate flights from Washington 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 November 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$842FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$525Average$720FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$609Average$711FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$618Average$694FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$670Average$861FlexibilityNo cancel feeOn-time81%
ANACheapest$703Average$887FlexibilityNo cancel feeOn-time80%
Cathay PacificCheapest$735Average$798FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$739Average$861FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$741Average$837FlexibilityNo cancel feeOn-time70%
China EasternCheapest$754Average$903FlexibilityNo cancel feeOn-time62%

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