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$356+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$621
(oojo)

One-way from

$356
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,039
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 ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:15 amSEA - HKT
1 stop19h 20mSingapore Airlines
Fri 11/78:10 pmHKT - SEA
1 stop26h 00mSingapore Airlines
Deal found 7/30$621
This oojo deal was found by Cheapflights users on 7/31. 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.
Thu 9/112:15 pmSEA - HKT
1 stop40h 00mAsiana Airlines
Sat 9/209:45 pmHKT - SEA
1 stop28h 45mAsiana Airlines
Deal found 7/31$674
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/192:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Mon 8/2512:45 amCNX - SEA
1 stop26h 00mAsiana Airlines
Deal found 7/30$676
This oojo deal was found by Cheapflights users on 7/29. 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.
Tue 11/1111:00 amSEA - BKK
1 stop22h 45mKorean Air
Tue 11/189:40 amBKK - SEA
1 stop38h 20mKorean Air
Deal found 7/29$680
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Sun 10/1210:15 amSEA - BKK
1 stop32h 00mSingapore Airlines
Thu 10/309:35 amBKK - SEA
1 stop36h 35mSingapore Airlines
Deal found 7/29$683
This oojo deal was found by Cheapflights users on 7/29. 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.
Mon 10/62:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 10/1311:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 7/29$684
This Gotogate deal was found by Cheapflights users on 7/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2710:00 amSEA - BKK
2 stops30h 00mANA
Wed 9/109:35 amBKK - SEA
2 stops23h 01mANA
Deal found 7/28$687
This oojo deal was found by Cheapflights users on 7/31. 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.
Wed 8/278:08 amSEA - BKK
2 stops31h 42mJapan Airlines
Wed 9/108:05 amBKK - SEA
2 stops20h 54mJapan Airlines
Deal found 7/31$689
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:55 pmSEA - BKK
1 stop20h 30mDelta
Sun 9/72:35 amBKK - SEA
1 stop25h 05mDelta
Deal found 7/31$695
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Wed 8/274:30 pmSEA - BKK
1 stop22h 05mUnited Airlines
Thu 9/119:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 7/31$700
This CheapOair deal was found by Cheapflights users on 7/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/131:20 pmSEA - BKK
1 stop19h 50mMultiple Airlines
Tue 8/262:35 amBKK - SEA
2 stops27h 25mMultiple Airlines
Deal found 7/31$709
This Gurufare deal was found by Cheapflights users on 7/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1711:35 pmSEA - BKK
1 stop28h 05mPhilippine Airlines
Tue 10/711:20 pmBKK - SEA
1 stop33h 55mPhilippine Airlines
Deal found 7/31$730

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 July 31, 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 10/21

10:15 am-7:35 pm

1 stop19h 20m

Phuket City

Fri 11/7

8:10 pm-7:10 am

1 stop26h 00m

$621

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 9/11

2:15 pm-8:15 pm

1 stop40h 00m

Phuket City

Sat 9/20

9:45 pm-12:30 pm

1 stop28h 45m

$674

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 8/19

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Mon 8/25

12:45 am-12:45 pm

1 stop26h 00m

$676

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/11

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Tue 11/18

9:40 am-9:00 am

1 stop38h 20m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 10/12

10:15 am-8:15 am

1 stop32h 00m

Bangkok Suvarnabhumi

Thu 10/30

9:35 am-8:10 am

1 stop36h 35m

$683

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 10/6

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Mon 10/13

11:55 am-12:30 pm

1 stop38h 35m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 8/27

10:00 am-6:00 am

2 stops30h 00m

Bangkok Suvarnabhumi

Wed 9/10

9:35 am-6:36 pm

2 stops23h 01m

$687

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 8/27

8:08 am-5:50 am

2 stops31h 42m

Bangkok Suvarnabhumi

Wed 9/10

8:05 am-2:59 pm

2 stops20h 54m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/25

12:55 pm-11:25 pm

1 stop20h 30m

Bangkok Suvarnabhumi

Sun 9/7

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 8/27

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 9/11

9:35 am-2:25 pm

1 stop18h 50m

$700

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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, September is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $946). Flying from State of Washington to Thailand in December is currently the most expensive (average of $1,563). 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 July 31, 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.

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 July 31, 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. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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
9.0
Wonderful
199 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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
1,220 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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
1,121 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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.
ANA
8.4
Very good
922 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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
1,536 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Overall

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 Korean Air ($356), Asiana Airlines ($357), and ANA ($363).

  • 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, September is the cheapest month in which you can book a flight from State of Washington to Thailand (average of $946). Flying from State of Washington to Thailand in December is currently the most expensive (average of $1,563). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$988FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$555Average$996FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$634Average$806FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$691Average$1,003FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$708Average$755FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$730Average$848FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$740Average$887FlexibilityNo cancel feeOn-timeN/A
ANACheapest$743Average$905FlexibilityNo cancel feeOn-time80%
China EasternCheapest$755Average$877FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,084FlexibilityNo cancel feeOn-time77%

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