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$418+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Round-trip from

$769
(FlightHub)

One-way from

$418
(Ovago)

Popular in

December

Cheapest in

February

Average price

$916
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. 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 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 April 2, 2025.

This Justfly.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 Justfly.com 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 10/316:00 pmHKT - SEA
1 stop28h 10mSingapore Airlines
Deal found 4/1$598
This CrystalTravel deal was found by Cheapflights users on 3/31. 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.
Tue 9/231:45 pmSEA - BKK
2 stops24h 50mANA
Tue 10/219:35 amBKK - SEA
1 stop18h 50mANA
Deal found 3/31$768
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/271:10 amSEA - BKK
1 stop25h 10mChina Airlines
Tue 5/65:30 pmBKK - SEA
1 stop16h 00mChina Airlines
Deal found 4/1$769
This Gurufare deal was found by Cheapflights users on 3/30. 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.
Tue 5/62:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 5/121:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 3/30$779
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.
Sun 5/411:35 pmSEA - BKK
1 stop28h 05mPhilippine Airlines
Thu 5/86:40 pmBKK - SEA
1 stop38h 35mPhilippine Airlines
Deal found 4/1$783
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/311:40 amSEA - CNX
1 stop18h 40mChina Airlines
Tue 9/1611:20 amCNX - SEA
1 stop22h 00mChina Airlines
Deal found 4/1$783
This oojo deal was found by Cheapflights users on 3/31. 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 4/2612:50 pmSEA - BKK
1 stop34h 25mKorean Air
Wed 5/149:40 pmBKK - SEA
1 stop27h 00mKorean Air
Deal found 3/31$792
This Justfly.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 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 stop41h 10mSingapore Airlines
Wed 12/1012:00 pmBKK - SEA
1 stop34h 10mSingapore Airlines
Deal found 4/1$805
This Trip.com deal was found by Cheapflights users on 3/31. 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.
Thu 8/2810:15 amSEA - BKK
1 stop38h 05mMultiple Airlines
Sun 9/71:30 pmBKK - SEA
1 stop19h 45mMultiple Airlines
Deal found 3/31$808
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 4/281:15 amSEA - BKK
1 stop25h 25mSTARLUX Airlines
Fri 5/161:10 pmBKK - SEA
1 stop17h 00mSTARLUX Airlines
Deal found 4/1$809
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 5/15:15 amSEA - BKK
2 stops28h 40mUnited Airlines
Tue 5/139:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 3/31$815
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

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 April 2, 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

Sun 4/27

1:10 am-4:20 pm

1 stop25h 10m

Bangkok Suvarnabhumi

Mon 5/5

2:40 am-7:30 pm

1 stop30h 50m

$769

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 5/6

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Mon 5/12

1:20 am-12:30 pm

1 stop25h 10m

$779

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/4

11:35 pm-5:40 pm

1 stop28h 05m

Bangkok Suvarnabhumi

Thu 5/8

6:40 pm-7:15 pm

1 stop38h 35m

$783

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:40 am-10:20 am

1 stop18h 40m

Chiang Mai

Tue 9/16

11:20 am-7:20 pm

1 stop22h 00m

$783

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 4/26

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Wed 5/14

9:40 pm-10:40 am

1 stop27h 00m

$792

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/28

1:15 am-4:40 pm

1 stop25h 25m

Bangkok Suvarnabhumi

Fri 5/16

1:10 pm-4:10 pm

1 stop17h 00m

$809

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/1

5:15 am-11:55 pm

2 stops28h 40m

Bangkok Suvarnabhumi

Tue 5/13

9:35 am-2:25 pm

1 stop18h 50m

$815

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Mon 9/15

12:45 am-12:30 pm

1 stop25h 45m

$832

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 4/8

10:25 am-6:00 am

2 stops29h 35m

Bangkok Suvarnabhumi

Sun 4/20

1:55 pm-2:25 pm

1 stop38h 30m

$838

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

4:30 pm-8:45 am

2 stops26h 15m

Chiang Mai

Tue 9/16

8:00 pm-2:25 pm

2 stops32h 25m

$843

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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 $958). 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 April 2, 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 April 2, 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
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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
146 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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
1,440 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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
146 reviews

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.0

Boarding

9.0

Food

8.9

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 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 Singapore Airlines ($418), China Airlines ($428), and Qatar Airways ($438).

  • 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 $958). 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

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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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$1,208FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$619Average$882FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$634Average$821FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$1,109FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$760FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$749Average$844FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
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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