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$354+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 November 17, 2025.

This FlightHub deal was found by Cheapflights users on 11/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3012:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Sun 12/710:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 11/17$678
This CrystalTravel deal was found by Cheapflights users on 11/15. 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.
Wed 11/263:40 pmSEA - BKK
1 stop22h 30mANA
Wed 1/217:10 amBKK - SEA
1 stop21h 10mANA
Deal found 11/15$680
This KAYAK deal was found by Cheapflights users on 11/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:30 pmSEA - BKK
1 stop29h 20mPhilippine Airlines
Tue 1/271:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/15$685
This SmartFares deal was found by Cheapflights users on 11/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:00 amSEA - BKK
1 stop22h 25mHainan Airlines
Mon 12/81:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/16$686
This iWofly deal was found by Cheapflights users on 11/16. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:00 amSEA - BKK
1 stop22h 45mKorean Air
Mon 12/1511:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 11/16$687
This SmartFares deal was found by Cheapflights users on 11/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3012:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Mon 12/2210:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 11/16$688
This iWofly deal was found by Cheapflights users on 11/15. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:59 pmSEA - BKK
2 stops37h 46mKorean Air
Sun 12/1411:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 11/15$693
This oojo deal was found by Cheapflights users on 11/15. 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 11/1810:00 amSEA - BKK
1 stop22h 25mHainan Airlines
Mon 1/121:05 amBKK - SEA
1 stop21h 55mHainan Airlines
Deal found 11/15$694
This Asiana Airlines deal was found by Cheapflights users on 11/15. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Thu 1/2211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/15$696
This Korean Air deal was found by Cheapflights users on 11/15. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:00 amSEA - BKK
1 stop22h 55mKorean Air
Tue 1/209:30 pmBKK - SEA
1 stop26h 30mKorean Air
Deal found 11/15$699
This KAYAK deal was found by Cheapflights users on 11/15. 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 KAYAK 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
Tue 1/271:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/15$702
This Korean Air deal was found by Cheapflights users on 11/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:10 pmSEA - BKK
2 stops45h 45mKorean Air
Wed 1/289:30 pmBKK - SEA
1 stop26h 30mKorean Air
Deal found 11/17$704

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 November 17, 2025.

Round-trip from

$534
(FlightHub)

One-way from

$354
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$813
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. 15% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 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

Sun 2/8

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Sat 2/21

12:20 pm-1:55 pm

1 stop16h 35m

$696

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 2/9

11:25 am-12:55 am

1 stop22h 30m

Bangkok Suvarnabhumi

Sat 3/7

9:40 am-1:20 pm

1 stop18h 40m

$705

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/6

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Fri 1/30

9:30 pm-9:00 am

1 stop26h 30m

$712

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/6

7:15 am-12:55 am

2 stops26h 40m

Bangkok Suvarnabhumi

Sat 1/31

11:15 pm-9:00 am

1 stop24h 45m

$712

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 1/23

8:45 am-2:05 pm

1 stop38h 20m

Phuket City

Mon 2/9

8:40 am-7:10 am

1 stop37h 30m

$720

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 2/3

8:45 am-7:50 am

1 stop32h 05m

Phuket City

Wed 2/11

11:05 am-7:10 am

1 stop35h 05m

$720

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 12/3

7:10 am-12:55 am

2 stops26h 45m

Bangkok Suvarnabhumi

Sun 12/14

9:30 pm-9:00 am

1 stop26h 30m

$721

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/26

7:10 am-12:55 am

2 stops26h 45m

Bangkok Suvarnabhumi

Tue 12/23

11:15 pm-4:55 pm

2 stops32h 40m

$723

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Wed 1/21

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Fri 2/6

10:55 pm-1:55 pm

1 stop30h 00m

$724

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Wed 1/21

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Sun 2/8

10:55 pm-1:55 pm

1 stop30h 00m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

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, February is the cheapest month in which you can book a flight from Seattle to Thailand (average of $514). Flying from Seattle to Thailand in May is currently the most expensive (average of $735). 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 November 17, 2025.

One of the essential ways to save on airfare from Seattle to Thailand is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 14% on airfare.

What is the cheapest day to fly from Seattle to Thailand?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Thailand. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Thailand flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 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
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
EVA Air
8.4
Very good
1,277 reviews
EVA Air
8.4
Very good
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
ANA
8.4
Very good
1,007 reviews
EVA Air
8.4
Very good
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
China Airlines
8.3
Very good
780 reviews
EVA Air
8.4
Very good
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Asiana Airlines
8.2
Very good
487 reviews
EVA Air
8.4
Very good
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Singapore Airlines
8.1
Very good
1,404 reviews
EVA Air
8.4
Very good
1,277 reviews

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.

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 $705, Asiana Airlines can have you in Thailand from Seattle in 22h 30m. 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?

    $354 is the cheapest one-way deal found within the past few days, from Hainan Airlines. You may also be able to find cheap deals on Asiana Airlines and Korean Air, with prices starting from $367 and $371, 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, February is the cheapest month in which you can book a flight from Seattle to Thailand (average of $514). Flying from Seattle to Thailand in May is currently the most expensive (average of $735). 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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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$983FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$525Average$943FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$609Average$711FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$618Average$761FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$670Average$862FlexibilityNo cancel feeOn-time81%
ANACheapest$703Average$887FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$730Average$834FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$798FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$739Average$861FlexibilityNo cancel feeOn-timeN/A
China EasternCheapest$754Average$903FlexibilityNo cancel feeOn-time62%

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