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$337+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap 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 December 28, 2025.

This Trip.com deal was found by Cheapflights users on 12/26. 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 12/309:30 pmSEA - BKK
1 stop34h 30mMultiple Airlines
Sat 1/315:50 pmBKK - SEA
1 stop15h 20mMultiple Airlines
Deal found 12/26$815
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:30 pmSEA - DMK
1 stop23h 10mMultiple Airlines
Sat 1/3111:10 pmDMK - SEA
2 stops30h 55mMultiple Airlines
Deal found 12/26$949
This oojo deal was found by Cheapflights users on 12/28. 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.
Sun 12/2812:10 amSEA - BKK
1 stop21h 55mChina Airlines
Mon 3/22:35 amBKK - SEA
1 stop30h 35mChina Airlines
Deal found 12/28$964
This oojo deal was found by Cheapflights users on 12/26. 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.
Sun 12/2812:10 amSEA - BKK
1 stop20h 20mEVA Air
Tue 3/35:15 pmBKK - SEA
1 stop15h 55mEVA Air
Deal found 12/26$966
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/297:12 pmSEA - BKK
2 stops25h 13mUnited Airlines
Tue 3/34:55 pmBKK - SEA
2 stops21h 35mUnited Airlines
Deal found 12/28$996
This FlightHub deal was found by Cheapflights users on 12/28. 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.
Sat 12/2712:10 amSEA - BKK
1 stop18h 40mChina Airlines
Sat 2/2810:55 amBKK - SEA
1 stop22h 15mChina Airlines
Deal found 12/28$1,006
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Tue 12/305:05 pmSEA - BKK
2 stops27h 20mUnited Airlines
Sat 1/314:55 pmBKK - SEA
2 stops21h 52mUnited Airlines
Deal found 12/26$1,038
This FlightHub deal was found by Cheapflights users on 12/26. 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.
Sat 12/2712:10 amSEA - BKK
1 stop32h 30mEVA Air
Thu 1/152:15 amBKK - SEA
1 stop30h 55mEVA Air
Deal found 12/26$1,044
This United Airlines deal was found by Cheapflights users on 12/27. 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.
Sat 12/277:12 pmSEA - BKK
2 stops49h 13mUnited Airlines
Mon 1/194:55 pmBKK - SEA
2 stops33h 46mUnited Airlines
Deal found 12/27$1,074
This oojo deal was found by Cheapflights users on 12/26. 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.
Mon 12/297:09 amSEA - BKK
2 stops26h 06mCathay Pacific
Tue 3/37:55 amBKK - SEA
2 stops25h 58mCathay Pacific
Deal found 12/26$1,090
This Mytrip deal was found by Cheapflights users on 12/26. 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 12/2912:10 amSEA - DMK
2 stops33h 25mMultiple Airlines
Wed 1/77:25 pmDMK - SEA
3 stops38h 51mMultiple Airlines
Deal found 12/26$1,373
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/289:30 pmSEA - DMK
1 stop23h 10mMultiple Airlines
Wed 12/319:20 amDMK - SEA
2 stops24h 20mMultiple Airlines
Deal found 12/27$1,481

Find flight deals from Washington to Bangkok

Keep the following information in mind while searching for Washington to Bangkok flight deals. Data was last updated December 28, 2025.

Round-trip from

$643
(Justfly.com)

One-way from

$337
(SmartFares)

Popular in

December

Cheapest in

September

Average price

$1,238
From Washington to Bangkok
Search Deals
One-way flight from Washington to Bangkok
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 28, 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

Fri 4/17

7:15 am-11:40 pm

2 stops26h 25m

Bangkok Suvarnabhumi

Mon 5/18

9:50 am-10:40 am

1 stop38h 50m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 4/17

7:15 am-11:40 pm

2 stops26h 25m

Bangkok Suvarnabhumi

Wed 5/13

9:40 pm-10:40 am

1 stop27h 00m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 5/5

12:50 pm-11:40 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Mon 5/25

9:40 pm-10:40 am

1 stop27h 00m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 4/24

12:50 pm-11:40 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Mon 5/11

11:30 pm-10:40 am

1 stop25h 10m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 4/7

12:50 pm-11:40 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Sun 4/19

11:30 pm-10:40 am

1 stop25h 10m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 4/7

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Tue 4/21

11:30 pm-10:40 am

1 stop25h 10m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/30

7:15 am-11:40 pm

2 stops26h 25m

Bangkok Suvarnabhumi

Sun 6/28

9:50 am-10:50 am

1 stop39h 00m

$658

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/13

7:15 am-11:40 pm

2 stops26h 25m

Bangkok Suvarnabhumi

Mon 5/18

11:30 pm-10:40 am

1 stop25h 10m

$658

PullmanBangkok

PUW - BKK

PUWBKK

Pullman Moscow Regional

Wed 4/22

7:28 pm-12:00 pm

2 stops26h 32m

Bangkok Suvarnabhumi

Wed 4/29

1:10 pm-11:59 pm

2 stops24h 49m

$812

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Tue 3/3

7:57 pm-12:35 pm

2 stops25h 38m

Bangkok Suvarnabhumi

Mon 3/16

1:45 pm-10:41 pm

2 stops22h 56m

$830

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 $524). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $944). 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.

How much does it cost to fly round-trip from State of Washington to Bangkok?

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 Korean Air, STARLUX Airlines, and Delta fly from State of Washington to Bangkok in about 25h 38m. The time it takes to get you to your destination can typically vary by up to 2h 02m. State of Washington and Bangkok are separated by a distance of 7525 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 Singapore Airlines, with whom users have recently found tickets for as low as $280. However, be on the lookout for offers from Philippine Airlines and Asiana 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 $524). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $944). 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$173Average$701FlexibilityNo cancel feeOn-time60%
DeltaCheapest$433Average$831FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$519Average$706FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$612Average$688FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$685Average$863FlexibilityNo cancel feeOn-time81%
ANACheapest$686Average$883FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$700Average$916FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$733Average$832FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$832FlexibilityNo cancel feeOn-timeN/A

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