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$278+ Cheap flights from Washington to Thailand

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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Washington to Thailand

Cheapest flights from Washington to Thailand
Explore the most affordable flight options available from Washington to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This FlightHub deal was found by Cheapflights users on 12/17. 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 12/3012:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Sat 2/2810:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 12/17$713
This FlightHub deal was found by Cheapflights users on 12/15. 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 12/303:40 pmSEA - BKK
1 stop23h 50mANA
Fri 1/162:25 pmBKK - SEA
1 stop37h 55mANA
Deal found 12/15$825
This oojo deal was found by Cheapflights users on 12/16. 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 12/3012:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Mon 1/2612:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 12/16$827
This FlightHub deal was found by Cheapflights users on 12/16. 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.
Sat 12/277:13 amSEA - BKK
2 stops29h 52mChina Eastern
Tue 4/72:10 amBKK - SEA
2 stops30h 13mChina Eastern
Deal found 12/16$928
This FlightHub deal was found by Cheapflights users on 12/18. 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 12/2812:10 amSEA - BKK
1 stop21h 55mChina Airlines
Mon 3/22:35 amBKK - SEA
1 stop30h 35mChina Airlines
Deal found 12/18$966
This CrystalTravel deal was found by Cheapflights users on 12/16. 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 12/2711:30 pmSEA - BKK
1 stop20h 40mEVA Air
Wed 4/811:10 amBKK - SEA
1 stop22h 20mEVA Air
Deal found 12/16$975
This FlightHub deal was found by Cheapflights users on 12/16. 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.
Wed 12/313:45 pmSEA - BKK
1 stop33h 35mANA
Mon 1/267:10 amBKK - SEA
2 stops23h 34mANA
Deal found 12/16$988
This oojo deal was found by Cheapflights users on 12/18. 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.
Sat 12/2712:10 amSEA - BKK
1 stop21h 55mChina Airlines
Sat 2/282:05 pmBKK - SEA
1 stop19h 05mChina Airlines
Deal found 12/18$998
This oojo deal was found by Cheapflights users on 12/16. 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.
Wed 12/315:45 pmSEA - BKK
2 stops26h 30mCathay Pacific
Mon 1/261:05 pmBKK - SEA
2 stops22h 47mCathay Pacific
Deal found 12/16$1,007
This oojo deal was found by Cheapflights users on 12/16. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mCathay Pacific
Wed 4/87:00 pmBKK - SEA
1 stop29h 10mCathay Pacific
Deal found 12/16$1,015
This Booking.com deal was found by Cheapflights users on 12/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2712:10 amSEA - BKK
1 stop18h 40mMultiple Airlines
Wed 4/87:20 pmBKK - SEA
2 stops27h 45mMultiple Airlines
Deal found 12/16$1,021
This KAYAK deal was found by Cheapflights users on 12/16. 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.
Wed 12/317:11 pmSEA - HKT
2 stops35h 24mMultiple Airlines
Sat 2/2810:55 pmHKT - SEA
1 stop30h 00mMultiple Airlines
Deal found 12/16$1,113

Find flight deals from Washington to Thailand

Keep the following information in mind while searching for Washington to Thailand flight deals. Data was last updated December 18, 2025.

Round-trip from

$592
(FlightHub)

One-way from

$278
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$1,229
From Washington to Thailand
Search Deals
One-way flight from Washington to Thailand
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Thailand 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 December 18, 2025.
Use the filters below to find and compare flights from Washington to Thailand that are best for you.

Fly from

Washington

Fly to

Thailand

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/17

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Thu 2/5

12:55 am-9:00 am

1 stop23h 05m

$692

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/17

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Sun 2/1

12:55 am-9:00 am

1 stop23h 05m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/17

1:30 pm-12:45 am

2 stops44h 15m

Bangkok Suvarnabhumi

Thu 2/19

9:40 am-9:00 am

1 stop38h 20m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/12

7:10 am-12:45 am

2 stops26h 35m

Bangkok Suvarnabhumi

Sat 2/21

2:05 am-5:45 pm

2 stops30h 40m

$709

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 2/2

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Thu 2/19

9:30 pm-2:44 pm

2 stops32h 14m

$709

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/24

7:15 am-12:20 am

2 stops26h 05m

Bangkok Suvarnabhumi

Mon 3/9

4:55 pm-6:50 pm

2 stops39h 55m

$738

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

7:15 am-12:20 am

2 stops26h 05m

Bangkok Suvarnabhumi

Thu 3/12

4:55 pm-12:59 am

2 stops22h 04m

$738

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/24

7:15 am-12:20 am

2 stops26h 05m

Bangkok Suvarnabhumi

Wed 3/11

4:55 pm-11:28 pm

2 stops20h 33m

$738

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/21

12:35 pm-5:10 am

2 stops49h 35m

Bangkok Suvarnabhumi

Tue 2/3

4:55 pm-9:12 pm

2 stops43h 17m

$741

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/14

12:30 pm-5:00 am

2 stops25h 30m

Bangkok Suvarnabhumi

Sun 2/1

1:10 am-11:59 pm

2 stops37h 49m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand 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 Thailand

What is the cheapest month to book a flight from State of Washington to Thailand?

Currently, February is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $513). Flying from State of Washington to Thailand in April is currently the most expensive (average of $690). 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 TH?

Find hourly flight availability from Washington to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

One of the essential ways to save on airfare from State of Washington to Thailand is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 42% on airfare.

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

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

Travelers seeking maximum savings on their State of Washington to Thailand flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday 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 Thailand. 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 Thailand?

    There are many flights that can get you from State of Washington to Thailand in 19h 15m. Fly via Korean Air, Asiana Airlines, or China Airlines to get the fastest option. The distance from State of Washington to Thailand is about 7190 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 Thailand one-way?

    The cheapest airlines for a one-way flight from State of Washington to Thailand are Singapore Airlines ($280), Philippine Airlines ($298), and Asiana Airlines ($348).

  • Can I find deals for flights from Washington to Thailand that include hotel bookings?

    Yes. In addition to deals on Washington to Thailand flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Thailand?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Thailand.

  • Can I find deals for business class flights from Washington to Thailand?

    Yes. Cheapflights offers flight deals from Washington to Thailand 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 Thailand?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $513). Flying from State of Washington to Thailand in April is currently the most expensive (average of $690). 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 Thailand

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 Thailand

Discover the top 10 airlines that operate flights from Washington to Thailand. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$906FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$518Average$952FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$605Average$708FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$611Average$760FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$685Average$921FlexibilityNo cancel feeOn-time81%
ANACheapest$694Average$885FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$730Average$827FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$831FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$753Average$921FlexibilityNo cancel feeOn-time69%

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