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$278+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 3, 2025.

This Gotogate deal was found by Cheapflights users on 10/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sat 12/611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 10/31$674
This FlightHub deal was found by Cheapflights users on 11/1. 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 11/169:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Tue 11/251:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/1$675
This Gotogate deal was found by Cheapflights users on 11/2. 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.
Mon 11/312:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sun 11/2311:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/2$676
This FlightHub deal was found by Cheapflights users on 11/3. 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.
Wed 11/269:30 pmSEA - BKK
1 stop29h 20mPhilippine Airlines
Tue 12/91:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/3$678
This FlightHub deal was found by Cheapflights users on 11/2. 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 11/912:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Fri 11/2110:15 pmHKT - SEA
1 stop30h 40mAsiana Airlines
Deal found 11/2$678
This CrystalTravel deal was found by Cheapflights users on 11/1. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:40 pmSEA - BKK
1 stop22h 30mANA
Mon 12/87:10 amBKK - SEA
1 stop21h 10mANA
Deal found 11/1$680
This Gotogate deal was found by Cheapflights users on 11/2. 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 11/412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Wed 11/1211:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/2$681
This Flightnetwork deal was found by Cheapflights users on 11/1. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:00 amSEA - HKT
1 stop43h 25mHainan Airlines
Fri 12/1910:05 pmHKT - SEA
1 stop24h 55mHainan Airlines
Deal found 11/1$681
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sun 11/2311:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/1$683
This FlightHub deal was found by Cheapflights users on 11/1. 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.
Mon 11/2412:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Fri 12/511:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 11/1$684
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Sun 11/99:30 pmSEA - BKK
1 stop23h 30mPhilippine Airlines
Wed 11/191:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 11/3$685
This SmartFares deal was found by Cheapflights users on 11/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:05 amSEA - BKK
2 stops33h 00mHainan Airlines
Wed 12/107:10 pmBKK - SEA
2 stops27h 55mHainan Airlines
Deal found 11/1$686

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 3, 2025.

Round-trip from

$531
(FlightHub)

One-way from

$278
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$833
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. 14% potential increase in price ($151 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 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 3, 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 1/17

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Sat 2/14

12:20 pm-1:55 pm

1 stop16h 35m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/18

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Thu 2/12

11:55 pm-1:55 pm

1 stop29h 00m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/16

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Mon 2/9

12:55 am-1:20 pm

1 stop27h 25m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 11/24

11:15 am-12:45 am

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 12/8

12:55 am-1:20 pm

1 stop27h 25m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/30

11:15 am-12:45 am

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 12/8

2:05 am-1:20 pm

1 stop26h 15m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/4

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 3/31

9:50 am-2:00 pm

1 stop18h 10m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 12/3

11:30 am-12:45 am

1 stop22h 15m

Bangkok Suvarnabhumi

Wed 12/10

11:15 pm-1:20 pm

1 stop29h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 12/1

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Tue 12/9

2:05 am-9:00 am

1 stop21h 55m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Thu 3/12

12:55 am-10:00 am

1 stop23h 05m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/21

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Thu 2/12

2:05 am-9:00 am

1 stop21h 55m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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 $517). 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 3, 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 3, 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
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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
1,270 reviews
EVA Air
8.4
Very good
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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
1,000 reviews
EVA Air
8.4
Very good
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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
776 reviews
EVA Air
8.4
Very good
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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
484 reviews
EVA Air
8.4
Very good
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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
1,391 reviews
EVA Air
8.4
Very good
1,270 reviews

Entertainment

8.0

Food

8.1

Crew

8.6

Overall

8.4

Boarding

8.4

Comfort

8.3

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 $720, Asiana Airlines can have you in Thailand from Seattle in 19h 40m. 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 cheapest airlines to fly from Seattle to Thailand one-way?

    $278 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on Asiana Airlines and Delta, with prices starting from $367 and $372, 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 $517). 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

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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 3, 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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