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$352+ Cheap flights from Seattle (SEA) to Bangkok

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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Seattle to Bangkok

Cheapest flights from Seattle to Bangkok
Explore the most affordable flight options available from Seattle to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Trip.com deal was found by Cheapflights users on 12/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:30 pmSEA - BKK
1 stop34h 30mMultiple Airlines
Sat 1/315:50 pmBKK - SEA
1 stop15h 20mMultiple Airlines
Deal found 12/26$815
This Kiwi.com deal was found by Cheapflights users on 12/26. 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.
Tue 12/309:30 pmSEA - DMK
1 stop23h 10mMultiple Airlines
Sat 1/3111:10 pmDMK - SEA
2 stops30h 55mMultiple Airlines
Deal found 12/26$949
This oojo deal was found by Cheapflights users on 12/27. 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 12/2812:10 amSEA - BKK
1 stop21h 55mChina Airlines
Tue 3/310:55 amBKK - SEA
1 stop22h 15mChina Airlines
Deal found 12/27$964
This oojo deal was found by Cheapflights users on 12/25. 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 12/2812:10 amSEA - BKK
1 stop20h 20mEVA Air
Tue 3/35:15 pmBKK - SEA
1 stop15h 55mEVA Air
Deal found 12/25$966
This FlightHub deal was found by Cheapflights users on 12/27. 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.
Sat 12/2712:10 amSEA - BKK
1 stop18h 40mChina Airlines
Sat 2/2810:55 amBKK - SEA
1 stop22h 15mChina Airlines
Deal found 12/27$1,006
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Tue 12/305:05 pmSEA - BKK
2 stops27h 20mUnited Airlines
Sat 1/314:55 pmBKK - SEA
2 stops21h 52mUnited Airlines
Deal found 12/26$1,038
This FlightHub deal was found by Cheapflights users on 12/26. 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.
Sat 12/2712:10 amSEA - BKK
1 stop32h 30mEVA Air
Thu 1/152:15 amBKK - SEA
1 stop30h 55mEVA Air
Deal found 12/26$1,044
This oojo deal was found by Cheapflights users on 12/25. 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.
Sat 12/2711:30 pmSEA - BKK
1 stop21h 00mEVA Air
Mon 1/1911:20 amBKK - SEA
1 stop21h 50mEVA Air
Deal found 12/25$1,061
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Thu 12/2512:10 amSEA - BKK
1 stop20h 00mEVA Air
Tue 1/135:15 pmBKK - SEA
1 stop15h 55mEVA Air
Deal found 12/25$1,063
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Mon 12/297:12 pmSEA - BKK
2 stops25h 13mUnited Airlines
Tue 3/34:55 pmBKK - SEA
2 stops21h 35mUnited Airlines
Deal found 12/25$1,067
This oojo deal was found by Cheapflights users on 12/24. 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 12/259:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Mon 2/911:50 pmBKK - SEA
1 stop33h 50mPhilippine Airlines
Deal found 12/24$1,069
This Mytrip deal was found by Cheapflights users on 12/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:10 amSEA - DMK
2 stops33h 25mMultiple Airlines
Wed 1/77:25 pmDMK - SEA
3 stops38h 51mMultiple Airlines
Deal found 12/26$1,373

Find flight deals from Seattle to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Round-trip from

$643
(Justfly.com)

One-way from

$352
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$1,238
From Seattle/Tacoma Intl to Bangkok
Search Deals
One-way flight from Seattle/Tacoma Intl to Bangkok
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Bangkok 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 December 28, 2025.
Use the filters below to find and compare flights from Seattle to Bangkok that are best for you.

Fly from

Seattle

Fly to

Bangkok

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/28

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 3/10

2:05 am-2:20 pm

1 stop26h 15m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/29

11:25 am-12:55 am

1 stop22h 30m

Bangkok Suvarnabhumi

Sat 3/7

3:05 am-1:20 pm

1 stop25h 15m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/1

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Mon 3/23

2:05 am-2:20 pm

1 stop26h 15m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 3/4

11:30 am-12:55 am

1 stop22h 25m

Bangkok Suvarnabhumi

Fri 4/3

9:50 am-1:07 pm

1 stop17h 17m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 3/3

11:30 am-11:20 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Thu 3/19

9:40 am-2:20 pm

1 stop18h 40m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/26

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Wed 4/15

9:50 am-1:07 pm

1 stop17h 17m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

11:30 am-12:55 am

1 stop22h 25m

Bangkok Suvarnabhumi

Mon 3/30

9:50 am-1:07 pm

1 stop17h 17m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/23

11:25 am-12:55 am

1 stop22h 30m

Bangkok Suvarnabhumi

Tue 2/3

2:05 am-1:20 pm

1 stop26h 15m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/30

11:25 am-12:55 am

1 stop22h 30m

Bangkok Suvarnabhumi

Tue 2/3

2:05 am-1:20 pm

1 stop26h 15m

$689

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/26

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Mon 4/13

9:50 am-1:07 pm

1 stop17h 17m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 44 results
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Best time to book a flight from Seattle to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok 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 Bangkok

How far ahead should I book a flight from Seattle to Bangkok?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Bangkok. Price data was last updated on December 26, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Bangkok, you should look to book at least 74 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $524). Flying from Seattle to Bangkok in June is currently the most expensive (average of $944). 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.

How much does it cost to fly round-trip from Seattle to Bangkok?

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated December 28, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air, and ANA from Seattle to Bangkok. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very good
250 reviews
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
EVA Air
8.5
Very good
1,304 reviews
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
ANA
8.4
Very good
1,049 reviews
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.3
Very good
795 reviews
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Asiana Airlines
8.2
Very good
502 reviews
STARLUX Airlines
8.9
Very good
250 reviews

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Overall

8.9

Food

8.6

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Related info for your journey

Find useful and relevant information for your journey from Seattle to Bangkok. 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 Bangkok?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Bangkok. 16 airlines have flights from Seattle/Tacoma Intl to Bangkok on a regular basis. Booking flights from Seattle/Tacoma Intl to Bangkok should not be difficult; the airport handles an average of 0 outbound flights to Bangkok per day.

  • How long is the flight from Seattle to Bangkok?

    Delta can get you from Seattle to Bangkok in just under 22h 20m. Your travel time can differ by up to . There are 7443 mi between Seattle and Bangkok.

  • What are the cheapest airlines flying from Seattle to Bangkok round-trip?

    Philippine Airlines, at $172, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include Delta and Singapore Airlines. Philippine Airlines is 80% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $280 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 Philippine Airlines and Asiana Airlines, with prices starting from $298 and $348, respectively.

  • Where are the most common layover locations when flying from Seattle to Bangkok?

    The most popular layover on flights from Seattle to Bangkok is Taipei City. Taipei City is followed by Seoul in terms of the most popular layover location on flights from Seattle to Bangkok. Singapore ranks third in terms of the most popular layover location on Seattle to Bangkok flights.

  • What are some popular things to do or see while on a layover in Taipei City?

    Taipei 101, Shilin Night Market, and Raohe Street Night Market are currently the most popular points of interest in Taipei City at the moment. Those on a layover in Taipei City interested in visiting Taipei 101, Shilin Night Market, or Raohe Street Night Market can do so by traveling 21.0 mi, 18.3 mi, and 21.6 mi, respectively from Taipei City Taiwan Taoyuan Intl. Travelers can book a car rental at Taipei City Taiwan Taoyuan Intl for about $73 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Seoul?

    The majority of Seoul visitors spend their time at Dongdaemun Market, Lotte World, and Bukchon Hanok Village. Dongdaemun Market, Lotte World, and Bukchon Hanok Village can be accessed by traveling approximately 31.6 mi, 35.7 mi, and 30.6 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $54 per day.

  • What are points of interest worth seeing during a layover in Singapore?

    Most Singapore visitors opt to spend their time at Sentosa, Universal Studios Singapore, and Geylang Serai New Market. Sentosa, Universal Studios Singapore and Geylang Serai New Market are located about 13.4 mi, 13.4 mi, and 6.9 mi, respectively from Singapore Changi if you are interested in checking them out. Those on a layover in Singapore in need of a rental car can book one at Singapore Changi for about $85.

  • Where are the least popular layover locations for Seattle to Bangkok flights?

    Seattle to Bangkok flights have a layover in Istanbul the least frequently. Seattle to Bangkok flights stopping in Tokyo are the next rarest. Tokyo follows Tokyo in terms of the least frequent layover locations on Seattle to Bangkok flights.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $524). Flying from Seattle to Bangkok in June is currently the most expensive (average of $944). 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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Top 10 airlines flying from Seattle to Bangkok

Discover the top 10 airlines that operate flights from Seattle to Bangkok. 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$173Average$701FlexibilityNo cancel feeOn-time60%
DeltaCheapest$433Average$867FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$519Average$706FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$612Average$688FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$685Average$753FlexibilityNo cancel feeOn-time81%
ANACheapest$686Average$883FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$700Average$916FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$733Average$832FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$858FlexibilityNo cancel feeOn-timeN/A

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