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$422+ 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
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 24, 2025.

Round-trip from

$781
(Korean Air)

One-way from

$422
(Justfly.com)

Popular in

December

Cheapest in

February

Average price

$846
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. 4% potential increase in price ($51 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 24, 2025.

This oojo deal was found by Cheapflights users on 4/22. 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 9/111:40 amSEA - BKK
1 stop18h 05mChina Airlines
Sun 9/285:30 pmBKK - SEA
1 stop15h 50mChina Airlines
Deal found 4/22$779
This Gurufare deal was found by Cheapflights users on 4/22. 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.
Mon 11/105:40 pmSEA - BKK
2 stops29h 55mSingapore Airlines
Mon 12/19:35 amBKK - SEA
1 stop36h 35mSingapore Airlines
Deal found 4/22$780
This Korean Air deal was found by Cheapflights users on 4/21. 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 4/2812:50 pmSEA - BKK
1 stop20h 50mKorean Air
Mon 5/1211:30 pmBKK - SEA
1 stop25h 10mKorean Air
Deal found 4/21$781
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Wed 8/134:30 pmSEA - BKK
1 stop22h 05mUnited Airlines
Tue 9/29:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 4/23$786
This Gurufare deal was found by Cheapflights users on 4/23. 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 11/123:40 pmSEA - BKK
1 stop22h 30mANA
Thu 12/119:25 amBKK - SEA
1 stop18h 55mANA
Deal found 4/23$791
This Trip.com deal was found by Cheapflights users on 4/21. 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.
Wed 8/272:10 amSEA - BKK
1 stop19h 00mEVA Air
Sun 9/712:25 pmBKK - SEA
1 stop21h 05mEVA Air
Deal found 4/21$792
This Delta deal was found by Cheapflights users on 4/23. 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 9/19:10 amGEG - BKK
2 stops22h 35mDelta
Tue 10/142:35 amBKK - GEG
2 stops34h 12mDelta
Deal found 4/23$793
This Korean Air deal was found by Cheapflights users on 4/23. 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.
Sun 8/312:32 pmGEG - BKK
2 stops42h 53mKorean Air
Mon 10/202:35 amBKK - GEG
2 stops24h 58mKorean Air
Deal found 4/23$805
This oojo deal was found by Cheapflights users on 4/23. 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 4/291:15 amSEA - BKK
1 stop25h 25mSTARLUX Airlines
Sat 5/315:50 pmBKK - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 4/23$814
This Delta deal was found by Cheapflights users on 4/22. 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 11/1411:15 amSEA - BKK
1 stop22h 30mDelta
Mon 12/19:30 pmBKK - SEA
1 stop30h 35mDelta
Deal found 4/22$828
This oojo deal was found by Cheapflights users on 4/23. 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 9/217:00 amSEA - BKK
2 stops34h 20mQatar Airways
Sun 10/58:00 pmBKK - SEA
1 stop30h 45mQatar Airways
Deal found 4/23$844
This KAYAK deal was found by Cheapflights users on 4/22. 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.
Thu 5/226:15 amSEA - BKK
2 stops31h 50mChina Eastern
Wed 5/282:10 amBKK - SEA
2 stops28h 35mChina Eastern
Deal found 4/22$865

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 24, 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 4/28

1:30 pm-11:00 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Mon 5/19

8:05 am-10:25 am

1 stop16h 20m

$783

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/27

1:10 am-9:45 am

1 stop18h 35m

Bangkok Suvarnabhumi

Sun 5/18

2:40 am-7:30 pm

1 stop30h 50m

$785

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 5/16

11:35 pm-5:40 pm

1 stop28h 05m

Bangkok Suvarnabhumi

Tue 6/24

11:20 pm-7:15 pm

1 stop33h 55m

$788

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/28

10:25 am-4:35 am

2 stops28h 10m

Bangkok Suvarnabhumi

Tue 5/13

1:55 pm-2:25 pm

1 stop38h 30m

$789

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/8

6:15 am-12:40 am

2 stops28h 25m

Bangkok Suvarnabhumi

Fri 5/16

9:55 pm-4:45 pm

2 stops32h 50m

$796

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 5/6

1:15 am-12:00 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Tue 5/20

1:10 pm-4:10 pm

1 stop17h 00m

$798

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 4/28

9:05 am-11:40 pm

2 stops24h 35m

Bangkok Suvarnabhumi

Mon 5/26

9:50 am-9:40 pm

2 stops25h 50m

$799

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/28

12:50 pm-11:40 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Tue 5/27

9:50 am-10:40 am

1 stop38h 50m

$800

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 5/7

12:40 pm-11:40 pm

1 stop21h 00m

Bangkok Suvarnabhumi

Mon 5/12

9:40 pm-1:35 pm

1 stop29h 55m

$803

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 7/15

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Tue 9/2

9:35 am-2:25 pm

1 stop18h 50m

$814

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

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 24, 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 24, 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
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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
157 reviews
STARLUX Airlines
9.1
Wonderful
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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
1,180 reviews
STARLUX Airlines
9.1
Wonderful
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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
1,062 reviews
STARLUX Airlines
9.1
Wonderful
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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
1,453 reviews
STARLUX Airlines
9.1
Wonderful
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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
727 reviews
STARLUX Airlines
9.1
Wonderful
157 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Comfort

9.0

Crew

9.3

Overall

9.1

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 Korean Air, with whom users have recently found tickets for as low as $422. However, be on the lookout for offers from ANA and Japan 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, 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 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$1,142FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$622Average$807FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$631Average$777FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$1,026FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$757FlexibilityNo cancel feeOn-time60%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
China AirlinesCheapest$755Average$855FlexibilityNo cancel feeOn-time70%
ANACheapest$759Average$928FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,110FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$997FlexibilityNo cancel feeOn-time69%

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