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$418+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
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 3, 2025.

Round-trip from

$763
(FlightHub)

One-way from

$428
(oojo)

Popular in

December

Cheapest in

February

Average price

$916
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. 2% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 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 3, 2025.

This CrystalTravel deal was found by Cheapflights users on 4/2. 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.
Sat 11/293:15 pmSEA - BKK
2 stops31h 00mKorean Air
Mon 12/151:00 amBKK - SEA
1 stop23h 00mKorean Air
Deal found 4/2$764
This FlightHub deal was found by Cheapflights users on 4/2. 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.
Sun 4/271:10 amSEA - BKK
1 stop18h 35mChina Airlines
Tue 5/610:50 amBKK - SEA
1 stop22h 40mChina Airlines
Deal found 4/2$769
This Delta deal was found by Cheapflights users on 4/2. 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.
Sun 4/1312:40 pmSEA - BKK
1 stop34h 35mDelta
Sat 5/1711:30 pmBKK - SEA
1 stop28h 05mDelta
Deal found 4/2$776
This Gurufare deal was found by Cheapflights users on 4/1. 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 9/32:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 11/1711:55 pmBKK - SEA
1 stop27h 40mAsiana Airlines
Deal found 4/1$779
This CrystalTravel deal was found by Cheapflights users on 4/1. 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.
Wed 10/151:45 pmSEA - BKK
2 stops24h 50mANA
Wed 11/57:10 amBKK - SEA
2 stops23h 15mANA
Deal found 4/1$782
This Trip.com deal was found by Cheapflights users on 4/1. 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.
Fri 5/211:35 pmSEA - BKK
1 stop28h 05mPhilippine Airlines
Tue 5/136:40 pmBKK - SEA
1 stop38h 35mPhilippine Airlines
Deal found 4/1$783
This Justfly.com deal was found by Cheapflights users on 4/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:15 amSEA - BKK
1 stop42h 45mSingapore Airlines
Wed 12/108:00 pmBKK - SEA
1 stop26h 10mSingapore Airlines
Deal found 4/2$805
This United Airlines deal was found by Cheapflights users on 4/1. 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 4/1$811
This oojo deal was found by Cheapflights users on 4/1. 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 9/1612:30 amSEA - BKK
1 stop20h 20mEVA Air
Wed 10/83:15 pmBKK - SEA
1 stop18h 15mEVA Air
Deal found 4/1$830
This oojo deal was found by Cheapflights users on 4/2. 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 4/2$844
This oojo deal was found by Cheapflights users on 4/1. 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 4/71:15 amSEA - BKK
1 stop20h 45mSTARLUX Airlines
Tue 4/151:10 pmBKK - SEA
1 stop17h 00mSTARLUX Airlines
Deal found 4/1$846
This Delta deal was found by Cheapflights users on 4/2. 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 9/15:05 amGEG - BKK
2 stops30h 00mDelta
Tue 10/212:35 amBKK - GEG
2 stops28h 22mDelta
Deal found 4/2$902

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 3, 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

Sun 4/27

1:10 am-9:45 am

1 stop18h 35m

Bangkok Suvarnabhumi

Tue 5/6

10:50 am-7:30 pm

1 stop22h 40m

$769

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/21

6:10 am-11:40 pm

2 stops27h 30m

Bangkok Suvarnabhumi

Sun 6/1

9:40 pm-10:50 am

1 stop27h 10m

$772

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/13

12:40 pm-1:15 pm

1 stop34h 35m

Bangkok Suvarnabhumi

Sat 5/17

11:30 pm-1:35 pm

1 stop28h 05m

$776

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 5/7

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 5/20

1:20 am-12:30 pm

1 stop25h 10m

$781

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 5/2

11:35 pm-5:40 pm

1 stop28h 05m

Bangkok Suvarnabhumi

Tue 5/13

6:40 pm-7:15 pm

1 stop38h 35m

$783

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 4/8

10:25 am-6:00 am

2 stops29h 35m

Bangkok Suvarnabhumi

Tue 4/15

1:55 pm-2:25 pm

1 stop38h 30m

$810

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 4/25

1:15 am-4:40 pm

1 stop25h 25m

Bangkok Suvarnabhumi

Tue 6/10

5:50 pm-4:10 pm

1 stop36h 20m

$811

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/1

5:05 am-11:55 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Tue 5/13

9:35 am-2:25 pm

1 stop18h 50m

$819

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/8

10:15 am-7:00 pm

1 stop42h 45m

Bangkok Suvarnabhumi

Tue 5/13

9:15 pm-4:40 pm

2 stops33h 25m

$865

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 5/5

4:30 pm-1:25 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Mon 5/26

8:40 am-8:00 pm

2 stops49h 20m

$867

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 55 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 3, 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 3, 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
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
147 reviews
STARLUX Airlines
9.1
Wonderful
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,170 reviews
STARLUX Airlines
9.1
Wonderful
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,052 reviews
STARLUX Airlines
9.1
Wonderful
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Japan Airlines
8.3
Very good
1,441 reviews
STARLUX Airlines
9.1
Wonderful
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
ANA
8.3
Very good
830 reviews
STARLUX Airlines
9.1
Wonderful
147 reviews

Crew

9.3

Food

8.9

Boarding

9.0

Comfort

9.0

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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 China Airlines, with whom users have recently found tickets for as low as $428. However, be on the lookout for offers from Qatar Airways and ANA, 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

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 April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$1,177FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$619Average$813FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$634Average$782FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$1,051FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$760FlexibilityNo cancel feeOn-time60%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
China AirlinesCheapest$755Average$854FlexibilityNo cancel feeOn-time70%
ANACheapest$760Average$934FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,105FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$1,003FlexibilityNo cancel feeOn-time69%

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