HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bangkok

$324+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Bangkok 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.

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 September 11, 2025.

Round-trip from

$667
(oojo)

One-way from

$324
(CrystalTravel)

Popular in

December

Cheapest in

February

Average price

$821
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 ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 11, 2025.

This oojo deal was found by Cheapflights users on 9/8. 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.
Thu 10/1610:15 amSEA - BKK
1 stop42h 45mSingapore Airlines
Mon 11/38:00 pmBKK - SEA
1 stop26h 10mSingapore Airlines
Deal found 9/8$667
This FlightHub deal was found by Cheapflights users on 9/10. 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 11/112:10 amSEA - BKK
1 stop31h 55mAsiana Airlines
Sat 12/611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/10$668
This oojo deal was found by Cheapflights users on 9/9. 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.
Thu 10/910:15 amSEA - BKK
1 stop42h 45mSingapore Airlines
Thu 10/163:30 pmBKK - SEA
1 stop31h 15mSingapore Airlines
Deal found 9/9$669
This Gurufare deal was found by Cheapflights users on 9/10. 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.
Wed 11/59:30 pmSEA - BKK
1 stop23h 35mPhilippine Airlines
Tue 12/211:35 pmBKK - SEA
1 stop34h 00mPhilippine Airlines
Deal found 9/10$670
This SmartFares deal was found by Cheapflights users on 9/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/292:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sat 10/41:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 9/11$671
This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2811:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Tue 10/711:20 pmBKK - SEA
1 stop33h 55mPhilippine Airlines
Deal found 9/11$672
This oojo deal was found by Cheapflights users on 9/9. 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.
Fri 10/1710:15 amSEA - BKK
1 stop19h 45mSingapore Airlines
Mon 10/279:35 amBKK - SEA
1 stop36h 35mSingapore Airlines
Deal found 9/9$673
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 10/2211:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Wed 11/51:20 pmBKK - SEA
1 stop20h 15mPhilippine Airlines
Deal found 9/10$675
This oojo deal was found by Cheapflights users on 9/9. 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 12/2712:10 amSEA - BKK
1 stop20h 05mAsiana Airlines
Sat 2/2811:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/9$676
This oojo deal was found by Cheapflights users on 9/9. 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 9/1512:50 pmSEA - BKK
1 stop22h 15mKorean Air
Wed 9/172:35 amBKK - SEA
1 stop22h 05mKorean Air
Deal found 9/9$677
This Asiana Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 12/2912:10 amSEA - BKK
1 stop30h 55mAsiana Airlines
Tue 1/2711:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/10$679
This Asiana Airlines deal was found by Cheapflights users on 9/10. 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 12/2812:10 amSEA - BKK
1 stop30h 55mAsiana Airlines
Sat 1/2411:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/10$680

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 September 11, 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

Wed 10/22

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 11/11

12:55 am-9:00 am

1 stop23h 05m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Tue 11/11

12:55 am-9:00 am

1 stop23h 05m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/28

12:00 pm-11:20 pm

1 stop21h 20m

Bangkok Suvarnabhumi

Sun 11/23

11:15 pm-9:00 am

1 stop24h 45m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/11

7:10 am-1:25 pm

2 stops39h 15m

Bangkok Suvarnabhumi

Wed 11/19

11:15 pm-9:00 am

1 stop24h 45m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/28

7:10 am-11:20 pm

2 stops26h 10m

Bangkok Suvarnabhumi

Mon 11/10

12:55 am-9:00 am

1 stop23h 05m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 10/22

7:10 am-1:15 pm

2 stops40h 05m

Bangkok Suvarnabhumi

Mon 11/10

9:40 am-9:00 am

1 stop38h 20m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 10/29

7:10 am-11:20 pm

2 stops26h 10m

Bangkok Suvarnabhumi

Sun 11/16

12:55 am-9:00 am

1 stop23h 05m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Wed 12/10

9:40 am-8:55 pm

2 stops26h 15m

$706

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 9/18

7:00 am-11:55 pm

2 stops26h 55m

Bangkok Suvarnabhumi

Wed 10/8

9:35 am-2:25 pm

1 stop18h 50m

$708

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 11/3

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Mon 12/1

12:55 am-4:21 pm

2 stops30h 26m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 60 results
1
2
3
...
6

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, September is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $908). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,518). 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 September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Bangkok as you normally would.

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, Delta, and EVA Air fly from State of Washington to Bangkok in about 18h 55m. The time it takes to get you to your destination can typically vary by up to 9h 31m. 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 Philippine Airlines, with whom users have recently found tickets for as low as $360. However, be on the lookout for offers from Asiana Airlines and Korean Air, 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, September is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $908). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,518). 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 Washington to Bangkok

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Suvarnabhumi flights
Los Angeles to Suvarnabhumi flights
Newark to Suvarnabhumi flights
Seattle to Suvarnabhumi flights
San Francisco to Suvarnabhumi flights
LaGuardia to Suvarnabhumi flights
Dulles Intl to Suvarnabhumi flights
O'Hare Intl to Suvarnabhumi flights
Dallas/Fort Worth to Suvarnabhumi flights
Ontario to Suvarnabhumi flights
Reagan-National to Suvarnabhumi flights
Hobby to Suvarnabhumi flights
Baltimore to Suvarnabhumi flights
Atlanta to Suvarnabhumi flights
Los Angeles to Don Mueang Intl flights
Boston to Suvarnabhumi flights
John F Kennedy Intl to Don Mueang Intl flights
Burbank to Suvarnabhumi flights
Santa Ana to Suvarnabhumi flights
Miami to Suvarnabhumi flights
George Bush Intcntl to Suvarnabhumi flights
Minneapolis to Suvarnabhumi flights
San Jose to Suvarnabhumi flights
Midway to Suvarnabhumi flights
Dulles Intl to Don Mueang Intl flights
Oakland to Suvarnabhumi flights
San Francisco to Don Mueang Intl flights
Sky Harbor Intl to Suvarnabhumi flights
Denver to Suvarnabhumi flights
Honolulu to Suvarnabhumi flights
Detroit to Suvarnabhumi flights
Las Vegas to Suvarnabhumi flights
Love Field to Suvarnabhumi flights
John F Kennedy Intl to Phuket City flights
Orlando to Suvarnabhumi flights
Philadelphia to Suvarnabhumi flights
Portland to Suvarnabhumi flights
San Diego to Suvarnabhumi flights
Tampa to Suvarnabhumi flights
Jacksonville to Suvarnabhumi flights
Charlotte to Suvarnabhumi flights
Austin to Suvarnabhumi flights
Los Angeles to Phuket City flights
O'Hare Intl to Don Mueang Intl flights
Newark to Don Mueang Intl flights
Raleigh to Suvarnabhumi flights
Newark to Phuket City flights
Omaha to Suvarnabhumi flights
Seattle to Don Mueang Intl flights
Columbus to Suvarnabhumi flights

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$877FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$531Average$738FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$609Average$753FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$628Average$731FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$673Average$934FlexibilityNo cancel feeOn-time81%
ANACheapest$715Average$895FlexibilityNo cancel feeOn-time80%
STARLUX AirlinesCheapest$742Average$882FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$745Average$859FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$874FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,083FlexibilityNo cancel feeOn-time77%

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.