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$372+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$715
(CheapOair)

One-way from

$372
(Delta)

Popular in

December

Cheapest in

February

Average price

$1,196
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. 6% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This CheapOair deal was found by Cheapflights users on 6/30. 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.
Wed 7/302:24 pmSEA - BKK
2 stops32h 51mKorean Air
Wed 8/139:50 amBKK - SEA
2 stops26h 22mKorean Air
Deal found 6/30$715
This KAYAK deal was found by Cheapflights users on 6/30. 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 9/217:00 amSEA - BKK
2 stops42h 30mANA
Wed 10/81:55 pmBKK - SEA
1 stop38h 30mANA
Deal found 6/30$717
This United Airlines deal was found by Cheapflights users on 6/30. 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 9/201:05 pmSEA - BKK
2 stops49h 30mUnited Airlines
Thu 10/29:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 6/30$718
This Asiana Airlines deal was found by Cheapflights users on 6/29. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/172:30 pmSEA - BKK
1 stop18h 40mAsiana Airlines
Mon 10/131:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 6/29$724
This Delta deal was found by Cheapflights users on 6/30. 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 8/2912:55 pmSEA - BKK
1 stop18h 50mDelta
Mon 9/82:35 amBKK - SEA
1 stop25h 05mDelta
Deal found 6/30$736
This FlightHub deal was found by Cheapflights users on 6/30. 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.
Tue 11/258:45 amSEA - BKK
1 stop20h 15mSingapore Airlines
Sat 12/66:05 pmBKK - SEA
1 stop28h 05mSingapore Airlines
Deal found 6/30$744
This KAYAK deal was found by Cheapflights users on 6/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2111:35 pmSEA - BKK
1 stop28h 05mPhilippine Airlines
Sat 10/46:40 pmBKK - SEA
1 stop38h 35mPhilippine Airlines
Deal found 6/28$750
This oojo deal was found by Cheapflights users on 6/30. 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 9/11:40 amSEA - BKK
1 stop18h 05mChina Airlines
Tue 9/161:20 pmBKK - SEA
1 stop20h 00mChina Airlines
Deal found 6/30$752
This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/136:20 amPSC - BKK
2 stops28h 45mKorean Air
Tue 8/192:35 amBKK - PSC
2 stops28h 00mKorean Air
Deal found 6/29$791
This Delta deal was found by Cheapflights users on 6/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:30 amGEG - BKK
2 stops27h 35mDelta
Sun 10/192:35 amBKK - GEG
2 stops28h 22mDelta
Deal found 6/28$794
This CheapOair deal was found by Cheapflights users on 6/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:10 amGEG - BKK
2 stops25h 55mKorean Air
Tue 10/212:35 amBKK - GEG
2 stops32h 49mKorean Air
Deal found 6/28$800
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Sun 8/101:36 pmPSC - BKK
2 stops44h 19mUnited Airlines
Thu 8/219:35 amBKK - PSC
2 stops27h 33mUnited Airlines
Deal found 6/30$809

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 June 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

Wed 7/30

2:24 pm-1:15 pm

2 stops32h 51m

Bangkok Suvarnabhumi

Wed 8/13

9:50 am-10:12 pm

2 stops26h 22m

$715

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 9/21

7:00 am-3:30 pm

2 stops42h 30m

Bangkok Suvarnabhumi

Wed 10/8

1:55 pm-2:25 pm

1 stop38h 30m

$717

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 9/20

1:05 pm-4:35 am

2 stops49h 30m

Bangkok Suvarnabhumi

Thu 10/2

9:35 am-2:25 pm

1 stop18h 50m

$718

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/17

2:30 pm-11:10 pm

1 stop18h 40m

Bangkok Suvarnabhumi

Mon 10/13

1:20 am-12:30 pm

1 stop25h 10m

$724

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 8/29

12:55 pm-9:45 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Mon 9/8

2:35 am-1:40 pm

1 stop25h 05m

$736

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 9/21

11:35 pm-5:40 pm

1 stop28h 05m

Bangkok Suvarnabhumi

Sat 10/4

6:40 pm-7:15 pm

1 stop38h 35m

$750

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/1

1:40 am-9:45 am

1 stop18h 05m

Bangkok Suvarnabhumi

Tue 9/16

1:20 pm-7:20 pm

1 stop20h 00m

$752

PascoBangkok

PSC - BKK

PSCBKK

Pasco Tri Cities

Wed 8/13

6:20 am-1:05 am

2 stops28h 45m

Bangkok Suvarnabhumi

Tue 8/19

2:35 am-4:35 pm

2 stops28h 00m

$791

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 9/1

7:30 am-1:05 am

2 stops27h 35m

Bangkok Suvarnabhumi

Sun 10/19

2:35 am-4:57 pm

2 stops28h 22m

$794

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Wed 10/15

9:10 am-1:05 am

2 stops25h 55m

Bangkok Suvarnabhumi

Tue 10/21

2:35 am-9:24 pm

2 stops32h 49m

$800

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 53 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 $952). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,573). 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 June 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.

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 June 30, 2025.
Peruse reviews from past customers who have flown with STARLUX Airlines, EVA Air, and Korean Air from Washington to Bangkok to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
187 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,210 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,101 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
ANA
8.4
Very good
892 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,504 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Boarding

9.0

Entertainment

9.0

Overall

9.0

Comfort

9.0

Food

8.8

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 Delta, with whom users have recently found tickets for as low as $372. 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, March is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $952). Flying from State of Washington to Bangkok in December is currently the most expensive (average of $1,573). 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.
John F Kennedy Intl to Suvarnabhumi flights
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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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$1,016FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$600Average$775FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$633Average$768FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$939FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$708Average$755FlexibilityNo cancel feeOn-time60%
STARLUX AirlinesCheapest$739Average$885FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$755Average$877FlexibilityNo cancel feeOn-time62%
China AirlinesCheapest$757Average$862FlexibilityNo cancel feeOn-time70%
ANACheapest$759Average$917FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,079FlexibilityNo cancel feeOn-time77%

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