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$317+ Cheap flights from Seattle (SEA) 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Seattle to Thailand

Keep the following information in mind while searching for Seattle to Thailand flight deals. Data was last updated August 20, 2025.

Round-trip from

$512
(oojo)

One-way from

$317
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$842
From Seattle/Tacoma Intl to Thailand
Search Deals
One-way flight from Seattle/Tacoma Intl to Thailand
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Thailand

Cheapest flights from Seattle to Thailand
Explore the most affordable flight options available from Seattle to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This oojo deal was found by Cheapflights users on 8/20. 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 11/28:45 amSEA - HKT
1 stop32h 05mSingapore Airlines
Fri 11/2111:05 amHKT - SEA
1 stop35h 05mSingapore Airlines
Deal found 8/20$644
This oojo deal was found by Cheapflights users on 8/17. 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 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 11/710:05 amHKT - SEA
1 stop36h 05mSingapore Airlines
Deal found 8/17$658
This oojo deal was found by Cheapflights users on 8/19. 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 9/2011:25 pmHKT - SEA
1 stop27h 05mAsiana Airlines
Deal found 8/19$674
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/12:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 9/1512:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/17$674
This oojo deal was found by Cheapflights users on 8/19. 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 9/22:15 pmSEA - HKT
1 stop40h 00mAsiana Airlines
Fri 10/3110:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 8/19$675
This oojo deal was found by Cheapflights users on 8/18. 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.
Thu 8/282:30 pmSEA - CNX
1 stop19h 10mAsiana Airlines
Sat 9/612:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 8/18$675
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1211:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Thu 10/2311:20 pmBKK - SEA
1 stop33h 55mPhilippine Airlines
Deal found 8/20$676
This Asiana Airlines deal was found by Cheapflights users on 8/18. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/142:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sun 10/2612:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 8/18$677
This CrystalTravel deal was found by Cheapflights users on 8/19. 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 8/281:30 pmSEA - BKK
1 stop26h 20mJapan Airlines
Thu 9/48:05 amBKK - SEA
1 stop16h 20mJapan Airlines
Deal found 8/19$678
This Asiana Airlines deal was found by Cheapflights users on 8/18. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 10/611:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 8/18$679
This CrystalTravel deal was found by Cheapflights users on 8/20. 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 9/91:30 pmSEA - BKK
1 stop19h 30mJapan Airlines
Tue 9/168:05 amBKK - SEA
2 stops22h 49mJapan Airlines
Deal found 8/20$680
This CrystalTravel deal was found by Cheapflights users on 8/18. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:40 pmSEA - BKK
1 stop23h 50mANA
Tue 11/119:25 amBKK - SEA
1 stop18h 55mANA
Deal found 8/18$681

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 August 20, 2025.
Use the filters below to find and compare flights from Seattle to Thailand that are best for you.

Fly from

Seattle

Fly to

Thailand

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 11/2

8:45 am-7:50 am

1 stop32h 05m

Phuket City

Fri 11/21

11:05 am-7:10 am

1 stop35h 05m

$644

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

10:05 am-7:10 am

1 stop36h 05m

$658

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 9/11

2:15 pm-8:15 pm

1 stop40h 00m

Phuket City

Tue 9/23

9:45 pm-12:30 pm

1 stop28h 45m

$674

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

11:25 pm-12:30 pm

1 stop27h 05m

$674

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 11/30

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Sun 12/7

10:55 pm-1:55 pm

1 stop30h 00m

$674

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

$674

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 8/28

2:30 pm-11:40 pm

1 stop19h 10m

Chiang Mai

Sat 9/6

12:45 am-12:30 pm

1 stop25h 45m

$675

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 12/1

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Sun 3/29

11:55 pm-2:55 pm

1 stop29h 00m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/24

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Thu 3/19

11:55 pm-2:55 pm

1 stop29h 00m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/21

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Sun 3/22

12:20 pm-2:55 pm

1 stop16h 35m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

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

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

What is the cheapest month to book a flight from Seattle to Thailand?

Currently, September is the cheapest month in which you can book a flight from Seattle to Thailand (average of $931). Flying from Seattle to Thailand in December is currently the most expensive (average of $1,546). 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 SEA to TH?

Find hourly flight availability from Seattle 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 August 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Thailand as you normally would.

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 August 20, 2025.
Read through reviews of airlines operating flights from Seattle to Thailand, such as EVA Air, ANA, and Korean Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,232 reviews
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
ANA
8.4
Very good
938 reviews
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Korean Air
8.4
Very good
1,131 reviews
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
China Airlines
8.3
Very good
764 reviews
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Asiana Airlines
8.2
Very good
475 reviews
EVA Air
8.4
Very good
1,232 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Crew

8.6

Food

8.1

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Related info for your journey

Find useful and relevant information for your journey from Seattle to Thailand. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Thailand?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Thailand from Seattle.

  • How long is the flight from Seattle to Thailand?

    For as low as $644, Singapore Airlines can have you in Thailand from Seattle in 32h 05m. The distance between Seattle and Thailand is about 7860 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Seattle to Thailand?

    While some choose either Seattle/Tacoma Intl - Bangkok Don Mueang Intl or Seattle/Tacoma Intl - Chiang Mai, Seattle/Tacoma Intl - Bangkok Suvarnabhumi is the most popular route from Seattle to Thailand.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Seattle to Thailand (average of $931). Flying from Seattle to Thailand in December is currently the most expensive (average of $1,546). 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 Seattle 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 Seattle to Thailand

Discover the top 10 airlines that operate flights from Seattle 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$1,049FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$533Average$992FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$629Average$802FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$681Average$916FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$700Average$756FlexibilityNo cancel feeOn-time60%
ANACheapest$715Average$896FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$730Average$848FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$741Average$886FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$755Average$878FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,087FlexibilityNo cancel feeOn-time77%

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