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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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This FlightHub deal was found by Cheapflights users on 1/27. 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.
Fri 5/1510:15 am
SEA
-
HKT
1 stop19h 00m
Singapore Airlines
Fri 5/229:55 am
HKT
-
SEA
1 stop36h 50m
Singapore Airlines
Deal found 1/27$507
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:15 am
SEA
-
HKT
1 stop34h 35m
Singapore Airlines
Wed 9/236:00 pm
HKT
-
SEA
1 stop28h 45m
Singapore Airlines
Deal found 1/28$509
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/610:15 am
SEA
-
HKT
1 stop32h 30m
Singapore Airlines
Sat 10/1711:40 am
HKT
-
SEA
1 stop35h 05m
Singapore Airlines
Deal found 1/28$601
This oojo deal was found by Cheapflights users on 1/27. 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 3/89:45 am
SEA
-
HKT
1 stop32h 05m
Singapore Airlines
Thu 3/198:40 am
HKT
-
SEA
1 stop37h 30m
Singapore Airlines
Deal found 1/27$639
This oojo deal was found by Cheapflights users on 1/27. 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 3/89:45 am
SEA
-
HKT
1 stop33h 30m
Singapore Airlines
Thu 4/169:55 am
HKT
-
SEA
1 stop36h 50m
Singapore Airlines
Deal found 1/27$641
This oojo deal was found by Cheapflights users on 1/27. 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 4/2111:10 pm
SEA
-
BKK
1 stop23h 00m
Philippine Airlines
Tue 5/51:25 pm
BKK
-
SEA
1 stop20h 40m
Philippine Airlines
Deal found 1/27$648
This oojo deal was found by Cheapflights users on 1/26. 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 7/2712:55 am
SEA
-
BKK
1 stop20h 20m
Asiana Airlines
Tue 8/1112:20 pm
BKK
-
SEA
1 stop17h 05m
Asiana Airlines
Deal found 1/26$650
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1212:55 am
SEA
-
BKK
1 stop20h 20m
Asiana Airlines
Wed 4/221:20 am
BKK
-
SEA
1 stop27h 35m
Asiana Airlines
Deal found 1/29$651
This Gurufare deal was found by Cheapflights users on 1/27. 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 4/227:06 pm
SEA
-
BKK
2 stops29h 09m
Multiple Airlines
Wed 4/2912:15 pm
BKK
-
SEA
1 stop34h 30m
Multiple Airlines
Deal found 1/27$652
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Thu 4/3010:15 am
SEA
-
BKK
1 stop42h 45m
Singapore Airlines
Sun 6/289:15 pm
BKK
-
SEA
1 stop49h 30m
Singapore Airlines
Deal found 1/27$653
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/912:10 am
SEA
-
BKK
1 stop31h 50m
Asiana Airlines
Tue 3/2411:55 pm
BKK
-
SEA
1 stop29h 00m
Asiana Airlines
Deal found 1/28$654
This FlightHub deal was found by Cheapflights users on 1/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2812:10 am
SEA
-
BKK
1 stop30h 50m
Asiana Airlines
Thu 2/511:55 pm
BKK
-
SEA
1 stop29h 00m
Asiana Airlines
Deal found 1/29$656

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 January 29, 2026.

Round-trip from

$639
(oojo)

One-way from

$278
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$789
From Washington to Thailand
Search Deals
One-way flight from Washington to Thailand
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($150 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 January 2026
Search Deals

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 January 29, 2026.
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

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 3/7

8:45 am-5:10 pm

1 stop41h 25m

Phuket City

Thu 3/19

8:40 am-8:10 am

1 stop37h 30m

$663

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 4/14

12:55 am-8:55 pm

1 stop30h 00m

Phuket City

Sun 5/3

10:15 pm-2:55 pm

1 stop30h 40m

$684

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Mon 2/23

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Tue 3/3

10:55 pm-1:55 pm

1 stop30h 00m

$687

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/12

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

Wed 4/29

9:50 am-1:07 pm

1 stop17h 17m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 5/2

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Wed 5/13

11:30 pm-10:40 am

1 stop25h 10m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/16

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Sun 5/10

9:40 pm-10:40 am

1 stop27h 00m

$701

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Thu 3/5

2:05 am-9:00 am

1 stop21h 55m

$701

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Mon 3/30

12:55 am-8:55 pm

1 stop30h 00m

Phuket City

Mon 4/20

10:15 pm-2:55 pm

1 stop30h 40m

$701

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/3

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Sun 5/17

11:30 pm-10:40 am

1 stop25h 10m

$701

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 5/1

7:00 am-11:40 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Sat 5/9

9:40 pm-10:40 am

1 stop27h 00m

$706

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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 $512). Flying from State of Washington to Thailand in May is currently the most expensive (average of $686). 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 January 29, 2026.

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 morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 49% 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 March 30, 2025.

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 20h 40m. Fly via Singapore Airlines, Asiana Airlines, or Delta to get the fastest option. The distance from State of Washington to Thailand is about 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 Thailand one-way?

    The cheapest airlines for a one-way flight from State of Washington to Thailand are Singapore Airlines ($280), Philippine Airlines ($301), 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 $512). Flying from State of Washington to Thailand in May is currently the most expensive (average of $686). 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 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$154Average$701FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$418Average$877FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$520Average$942FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$615Average$785FlexibilityNo cancel feeOn-time76%
ANACheapest$683Average$882FlexibilityNo cancel feeOn-time80%
DeltaCheapest$694Average$923FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$700Average$896FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$730Average$820FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$836FlexibilityNo cancel feeOn-timeN/A

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