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$430+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Round-trip from

$784
(FlightHub)

One-way from

$434
(oojo)

Popular in

December

Cheapest in

February

Average price

$846
From Washington to Bangkok
Search Deals
One-way flight from Washington to Bangkok
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This FlightHub deal was found by Cheapflights users on 4/28. 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.
Mon 11/103:40 pmSEA - BKK
1 stop33h 40mANA
Wed 11/269:25 amBKK - SEA
2 stops24h 01mANA
Deal found 4/28$784
This United Airlines deal was found by Cheapflights users on 4/29. 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
Thu 10/29:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 4/29$785
This Korean Air deal was found by Cheapflights users on 4/29. 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.
Thu 11/66:15 amSEA - BKK
2 stops27h 30mKorean Air
Mon 11/1711:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 4/29$787
This oojo deal was found by Cheapflights users on 4/28. 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.
Tue 10/281:10 amSEA - BKK
1 stop18h 40mChina Airlines
Tue 11/255:50 pmBKK - SEA
1 stop15h 25mChina Airlines
Deal found 4/28$793
This Delta deal was found by Cheapflights users on 4/29. 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.
Mon 9/17:15 amGEG - BKK
2 stops27h 50mDelta
Sun 10/192:35 amBKK - GEG
2 stops32h 29mDelta
Deal found 4/29$793
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Thu 5/86:15 amSEA - BKK
2 stops28h 25mChina Eastern
Thu 5/225:05 amBKK - SEA
2 stops25h 40mChina Eastern
Deal found 4/29$796
This CheapOair deal was found by Cheapflights users on 4/29. 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.
Mon 9/16:00 amGEG - BKK
2 stops27h 25mKorean Air
Mon 10/1311:30 pmBKK - GEG
2 stops28h 03mKorean Air
Deal found 4/29$798
This CrystalTravel deal was found by Cheapflights users on 4/29. 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.
Fri 10/31:15 amSEA - BKK
1 stop20h 45mSTARLUX Airlines
Sun 10/121:10 pmBKK - SEA
1 stop17h 00mSTARLUX Airlines
Deal found 4/29$800
This oojo deal was found by Cheapflights users on 4/28. 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.
Fri 5/22:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 5/121:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 4/28$802
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Sun 11/28:45 amSEA - BKK
1 stop41h 15mSingapore Airlines
Tue 11/119:10 pmBKK - SEA
2 stops31h 42mSingapore Airlines
Deal found 4/29$808
This Philippine Airlines deal was found by Cheapflights users on 4/29. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1211:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Thu 9/2511:20 pmBKK - SEA
1 stop33h 55mPhilippine Airlines
Deal found 4/29$810
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 9/512:45 pmSEA - BKK
1 stop19h 00mDelta
Mon 9/159:50 amBKK - SEA
1 stop17h 50mDelta
Deal found 4/29$818

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 April 30, 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

Mon 9/22

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Tue 9/30

9:35 am-2:25 pm

1 stop18h 50m

$785

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/2

2:00 pm-1:05 am

2 stops45h 05m

Bangkok Suvarnabhumi

Wed 10/15

2:35 am-10:40 am

1 stop22h 05m

$787

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/14

1:45 pm-4:35 am

2 stops24h 50m

Bangkok Suvarnabhumi

Wed 9/3

9:35 am-8:54 pm

2 stops25h 19m

$788

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 9/1

7:15 am-1:05 am

2 stops27h 50m

Bangkok Suvarnabhumi

Sun 10/19

2:35 am-9:04 pm

2 stops32h 29m

$793

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/15

6:15 am-12:40 am

2 stops28h 25m

Bangkok Suvarnabhumi

Fri 5/30

7:10 pm-4:45 pm

2 stops35h 35m

$796

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 9/1

6:00 am-11:25 pm

2 stops27h 25m

Bangkok Suvarnabhumi

Mon 10/13

11:30 pm-1:33 pm

2 stops28h 03m

$798

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 10/3

1:15 am-12:00 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sun 10/12

1:10 pm-4:10 pm

1 stop17h 00m

$800

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 8/29

2:30 pm-11:10 pm

1 stop18h 40m

Bangkok Suvarnabhumi

Fri 9/12

1:20 am-12:30 pm

1 stop25h 10m

$802

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/12

11:35 pm-12:15 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Thu 9/25

11:20 pm-7:15 pm

1 stop33h 55m

$810

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/19

10:15 am-8:05 am

1 stop31h 50m

Bangkok Suvarnabhumi

Sun 10/5

9:15 pm-8:45 am

1 stop49h 30m

$815

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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, March is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $958). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,574). 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 April 30, 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.

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 April 30, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, EVA Air and Korean Air from Washington to Bangkok by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
161 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,186 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,066 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Japan Airlines
8.3
Very good
1,459 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Entertainment

9.0

Boarding

9.0

Overall

9.1

Crew

9.3

Food

8.9

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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.

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

    The cheapest airline one-way is Japan Airlines, with whom users have recently found tickets for as low as $434. However, be on the lookout for offers from ANA and Qatar Airways, 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, March is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $958). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,574). 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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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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$441Average$1,139FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$623Average$807FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$631Average$775FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$1,016FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$757FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$753Average$854FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
ANACheapest$759Average$926FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,101FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$996FlexibilityNo cancel feeOn-time69%

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