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$324+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$661
(Gotogate)

One-way from

$324
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$784
From Seattle/Tacoma Intl to Thailand
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One-way flight from Seattle/Tacoma Intl to Thailand
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This Gotogate deal was found by Cheapflights users on 9/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:10 amSEA - BKK
1 stop30h 55mAsiana Airlines
Sun 11/3011:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/15$661
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Thu 10/21:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 9/15$663
This oojo deal was found by Cheapflights users on 9/16. 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 10/2112:50 pmSEA - BKK
1 stop34h 25mKorean Air
Tue 10/2812:55 amBKK - SEA
1 stop23h 05mKorean Air
Deal found 9/16$664
This lol.travel deal was found by Cheapflights users on 9/15. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:50 pmSEA - BKK
1 stop18h 55mKorean Air
Wed 10/12:35 amBKK - SEA
2 stops27h 31mKorean Air
Deal found 9/15$665
This oojo deal was found by Cheapflights users on 9/16. 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 11/269:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Wed 12/101:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 9/16$666
This Justfly.com deal was found by Cheapflights users on 9/16. 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 11/48:45 amSEA - HKT
1 stop32h 05mSingapore Airlines
Thu 11/610:05 amHKT - SEA
1 stop36h 05mSingapore Airlines
Deal found 9/16$666
This Jettzy deal was found by Cheapflights users on 9/17. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Wed 12/1011:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/17$667
This oojo deal was found by Cheapflights users on 9/16. 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 11/269:30 pmSEA - BKK
1 stop29h 20mPhilippine Airlines
Thu 12/251:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 9/16$668
This oojo deal was found by Cheapflights users on 9/16. 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 9/3012:50 pmSEA - BKK
1 stop22h 15mKorean Air
Mon 10/62:35 amBKK - SEA
1 stop22h 05mKorean Air
Deal found 9/16$669
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:30 pmSEA - BKK
1 stop23h 30mPhilippine Airlines
Sun 11/161:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 9/15$671
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:45 amSEA - HKT
1 stop32h 05mSingapore Airlines
Mon 11/248:40 amHKT - SEA
1 stop37h 30mSingapore Airlines
Deal found 9/15$673
This IEagle deal was found by Cheapflights users on 9/15. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/232:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sat 11/111:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/15$674

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 September 17, 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

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/31

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Tue 2/10

11:55 pm-1:55 pm

1 stop29h 00m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 12/1

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Fri 12/26

11:55 pm-1:55 pm

1 stop29h 00m

$688

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/29

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Wed 10/15

11:55 am-12:30 pm

1 stop38h 35m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/11

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Tue 11/18

12:55 am-9:00 am

1 stop23h 05m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/28

12:00 pm-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Wed 11/12

12:55 am-9:00 am

1 stop23h 05m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 10/20

7:25 am-1:05 am

2 stops27h 40m

Bangkok Suvarnabhumi

Wed 11/19

12:55 am-9:00 am

1 stop23h 05m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/5

7:10 am-12:45 am

2 stops26h 35m

Bangkok Suvarnabhumi

Sun 11/16

12:55 am-9:00 am

1 stop23h 05m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/4

5:55 pm-9:30 pm

2 stops36h 35m

Bangkok Suvarnabhumi

Mon 11/17

12:55 am-9:00 am

1 stop23h 05m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 10/22

7:10 am-1:15 pm

2 stops40h 05m

Bangkok Suvarnabhumi

Mon 11/10

9:30 pm-9:00 am

1 stop26h 30m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/5

7:10 am-12:45 am

2 stops26h 35m

Bangkok Suvarnabhumi

Wed 11/19

12:55 am-9:00 am

1 stop23h 05m

$704

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 $900). Flying from Seattle to Thailand in December is currently the most expensive (average of $1,507). 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 September 17, 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 September 17, 2025.
Read through reviews of airlines operating flights from Seattle to Thailand, such as EVA Air, ANA, and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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
1,237 reviews
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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
964 reviews
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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
768 reviews
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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
481 reviews
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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
Singapore Airlines
8.1
Very good
1,367 reviews
EVA Air
8.4
Very good
1,237 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

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 $699, Asiana Airlines can have you in Thailand from Seattle in 22h 45m. The distance between Seattle and Thailand is about 7443 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Seattle to Thailand one-way?

    $346 is the cheapest one-way deal found within the past few days, from Asiana Airlines. You may also be able to find cheap deals on Delta and Korean Air, with prices starting from $372 and $374, respectively.

  • 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 - Phuket City, 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 $900). Flying from Seattle to Thailand in December is currently the most expensive (average of $1,507). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$988FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$526Average$977FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$605Average$753FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$628Average$786FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$673Average$903FlexibilityNo cancel feeOn-time81%
ANACheapest$715Average$894FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$730Average$843FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$742Average$882FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$755Average$876FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,088FlexibilityNo cancel feeOn-time77%

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