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$381+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Washington to Thailand

Keep the following information in mind while searching for Washington to Thailand flight deals. Data was last updated June 16, 2025.

Round-trip from

$624
(FlightHub)

One-way from

$381
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$1,195
From Washington to Thailand
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One-way flight from Washington to Thailand
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Highest demand for flights based on searches. 6% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 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 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 June 16, 2025.

This FlightHub deal was found by Cheapflights users on 6/14. 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 9/210:15 amSEA - HKT
1 stop32h 50mSingapore Airlines
Fri 10/3110:05 amHKT - SEA
1 stop36h 05mSingapore Airlines
Deal found 6/14$624
This oojo deal was found by Cheapflights users on 6/14. 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 10/52:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sat 10/181:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 6/14$755
This CrystalTravel deal was found by Cheapflights users on 6/15. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:00 amSEA - BKK
2 stops26h 55mANA
Tue 9/29:35 amBKK - SEA
1 stop18h 50mANA
Deal found 6/15$758
This KAYAK deal was found by Cheapflights users on 6/14. 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.
Fri 9/1911:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Fri 10/31:30 pmBKK - SEA
1 stop19h 45mPhilippine Airlines
Deal found 6/14$759
This FlightHub deal was found by Cheapflights users on 6/15. 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.
Sat 9/131:15 amSEA - BKK
1 stop20h 45mSTARLUX Airlines
Sun 9/285:50 pmBKK - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 6/15$760
This oojo deal was found by Cheapflights users on 6/14. 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 10/281:10 amSEA - BKK
1 stop21h 55mChina Airlines
Sun 11/162:35 amBKK - SEA
1 stop30h 40mChina Airlines
Deal found 6/14$762
This CrystalTravel deal was found by Cheapflights users on 6/14. 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 10/1812:50 pmSEA - BKK
1 stop22h 15mKorean Air
Tue 10/281:00 amBKK - SEA
1 stop23h 00mKorean Air
Deal found 6/14$766
This FlightHub deal was found by Cheapflights users on 6/14. 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 8/311:15 amSEA - CNX
1 stop25h 05mSTARLUX Airlines
Tue 9/165:20 pmCNX - SEA
1 stop36h 50mSTARLUX Airlines
Deal found 6/14$766
This FlightHub deal was found by Cheapflights users on 6/14. 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 8/288:08 amSEA - BKK
2 stops31h 42mJapan Airlines
Thu 9/118:05 amBKK - SEA
2 stops20h 49mJapan Airlines
Deal found 6/14$770
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1112:55 pmSEA - BKK
1 stop20h 30mDelta
Thu 8/289:50 amBKK - SEA
1 stop18h 11mDelta
Deal found 6/15$780
This IEagle deal was found by Cheapflights users on 6/13. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/159:10 amGEG - BKK
2 stops25h 55mKorean Air
Wed 9/242:35 amBKK - GEG
2 stops26h 09mKorean Air
Deal found 6/13$781
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Wed 7/94:30 pmSEA - BKK
1 stop22h 05mUnited Airlines
Thu 7/249:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 6/14$786

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 June 16, 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

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 9/2

10:15 am-9:05 am

1 stop32h 50m

Phuket City

Fri 10/31

10:05 am-8:10 am

1 stop36h 05m

$624

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 10/5

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Sat 10/18

1:20 am-12:30 pm

1 stop25h 10m

$755

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/21

7:00 am-11:55 pm

2 stops26h 55m

Bangkok Suvarnabhumi

Tue 9/2

9:35 am-2:25 pm

1 stop18h 50m

$758

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/19

11:35 pm-12:15 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Fri 10/3

1:30 pm-7:15 pm

1 stop19h 45m

$759

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 9/13

1:15 am-12:00 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sun 9/28

5:50 pm-4:10 pm

1 stop36h 20m

$760

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/28

1:10 am-1:05 pm

1 stop21h 55m

Bangkok Suvarnabhumi

Sun 11/16

2:35 am-6:15 pm

1 stop30h 40m

$762

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 10/18

12:50 pm-1:05 am

1 stop22h 15m

Bangkok Suvarnabhumi

Tue 10/28

1:00 am-10:00 am

1 stop23h 00m

$766

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Tue 9/16

5:20 pm-4:10 pm

1 stop36h 50m

$766

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/28

8:08 am-5:50 am

2 stops31h 42m

Bangkok Suvarnabhumi

Thu 9/11

8:05 am-2:54 pm

2 stops20h 49m

$770

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/11

12:55 pm-9:45 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Tue 8/26

9:40 pm-2:01 pm

1 stop30h 21m

$780

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

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, March is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $953). Flying from State of Washington to Thailand 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 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 June 16, 2025.

When flying from State of Washington to Thailand, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Thailand by month

Plan your trip to Thailand by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Thailand 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 Thailand when rainfall is around 0.4 in.

Temperature in Thailand by month

Plan your trip to Thailand by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Thailand, 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 Thailand

Get insights into the airlines that provide service to Thailand. 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 Thailand. Reviews last updated June 16, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, EVA Air and Korean Air from Washington to Thailand by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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
1,204 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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
1,090 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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
1,494 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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.
China Airlines
8.3
Very good
740 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Crew

9.3

Overall

9.1

Boarding

9.0

Food

8.8

Entertainment

8.9

Comfort

9.0

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 Thailand. 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 Thailand one-way?

    The cheapest airlines for a one-way flight from State of Washington to Thailand are Asiana Airlines ($387), STARLUX Airlines ($394), and Korean Air ($399).

  • 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, March is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $953). Flying from State of Washington to Thailand 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 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 June 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$1,079FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$606Average$991FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$632Average$812FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$694Average$1,028FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$708Average$756FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$736Average$863FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$739Average$893FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
ANACheapest$759Average$924FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,080FlexibilityNo cancel feeOn-time77%

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