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$348+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Dec 9 — Dec 161
Tue 12/9
Tue 12/16
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 November 9, 2025.

Round-trip from

$675
(FlightHub)

One-way from

$348
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$833
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. 14% potential increase in price ($151 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 9, 2025.

This FlightHub deal was found by Cheapflights users on 11/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Tue 11/251:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/9$675
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/912:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Wed 11/1211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/6$676
This oojo deal was found by Cheapflights users on 11/8. 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.
Tue 12/211:00 amSEA - BKK
1 stop19h 30mKorean Air
Tue 12/1611:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 11/8$677
This Asiana Airlines deal was found by Cheapflights users on 11/7. 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.
Tue 11/1112:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Wed 11/2611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/7$679
This SmartFares deal was found by Cheapflights users on 11/7. 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.
Tue 11/1110:00 amSEA - BKK
1 stop37h 10mHainan Airlines
Mon 11/241:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/7$686
This oojo deal was found by Cheapflights users on 11/9. 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.
Tue 11/1110:00 amSEA - BKK
1 stop37h 10mHainan Airlines
Wed 11/1911:10 amBKK - SEA
2 stops35h 55mHainan Airlines
Deal found 11/9$687
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1110:00 amSEA - BKK
1 stop37h 10mHainan Airlines
Mon 12/14:15 pmBKK - SEA
1 stop30h 45mHainan Airlines
Deal found 11/6$690
This oojo deal was found by Cheapflights users on 11/7. 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 11/2010:05 amSEA - BKK
2 stops33h 00mHainan Airlines
Mon 12/14:15 pmBKK - SEA
1 stop30h 45mHainan Airlines
Deal found 11/7$694
This Trip.com deal was found by Cheapflights users on 11/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sat 11/2211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/8$695
This Asiana Airlines deal was found by Cheapflights users on 11/8. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Mon 11/2411:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/8$696
This Korean Air deal was found by Cheapflights users on 11/9. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:00 amSEA - BKK
1 stop22h 55mKorean Air
Wed 12/109:30 pmBKK - SEA
1 stop26h 30mKorean Air
Deal found 11/9$698
This oojo deal was found by Cheapflights users on 11/7. 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 11/149:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Thu 11/271:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/7$701

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 November 9, 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

Sat 3/7

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Fri 8/28

1:20 am-3:10 pm

1 stop27h 50m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/15

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Sun 2/1

2:05 am-9:00 am

1 stop21h 55m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 12/3

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Wed 12/10

9:30 pm-9:00 am

1 stop26h 30m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Mon 2/2

2:05 am-2:55 pm

2 stops27h 50m

$714

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 12/2

3:45 pm-12:55 am

2 stops42h 10m

Bangkok Suvarnabhumi

Wed 12/10

12:55 am-2:44 pm

2 stops28h 49m

$714

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/6

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Wed 1/21

2:05 am-9:00 am

1 stop21h 55m

$715

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/23

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Mon 2/2

2:05 am-9:00 am

1 stop21h 55m

$728

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/26

7:10 am-1:25 pm

2 stops39h 15m

Bangkok Suvarnabhumi

Mon 12/22

2:05 am-5:00 pm

2 stops29h 55m

$731

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 11/28

7:59 pm-12:45 am

2 stops37h 46m

Bangkok Suvarnabhumi

Sun 12/14

11:15 pm-9:00 am

1 stop24h 45m

$733

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 3/16

7:15 am-11:20 pm

2 stops26h 05m

Bangkok Suvarnabhumi

Wed 5/13

11:30 pm-4:58 pm

2 stops31h 28m

$778

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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, February is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $532). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $993). 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 November 9, 2025.

One of the essential ways to save on airfare from State of Washington to Bangkok is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 20% on airfare.

What is the cheapest day to fly from State of Washington to Bangkok?

Use this chart to determine the cheapest time to fly round-trip from Washington to Bangkok. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Bangkok flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 Asiana Airlines, Korean Air, and Delta fly from State of Washington to Bangkok in about 20h 05m. The time it takes to get you to your destination can typically vary by up to 6h. 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 Delta, with whom users have recently found tickets for as low as $372. However, be on the lookout for offers from Korean Air and Philippine 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, February is the cheapest month in which you can book a flight from State of Washington to Bangkok (average of $532). Flying from State of Washington to Bangkok in June is currently the most expensive (average of $993). 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 November 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$842FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$525Average$720FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$609Average$711FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$618Average$694FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$670Average$861FlexibilityNo cancel feeOn-time81%
ANACheapest$703Average$887FlexibilityNo cancel feeOn-time80%
Cathay PacificCheapest$735Average$798FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$739Average$861FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$741Average$837FlexibilityNo cancel feeOn-time70%
China EasternCheapest$754Average$903FlexibilityNo cancel feeOn-time62%

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