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$350+ 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Bangkok are usually found in September or February, booked 74 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 15, 2025.

This FlightHub deal was found by Cheapflights users on 12/13. 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 12/313:45 pmSEA - BKK
1 stop23h 45mANA
Mon 1/269:10 amBKK - SEA
1 stop19h 10mANA
Deal found 12/13$785
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Wed 1/2811:50 amBKK - SEA
1 stop35h 15mMultiple Airlines
Deal found 12/12$922
This United Airlines deal was found by Cheapflights users on 12/13. 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.
Wed 12/317:12 pmSEA - BKK
2 stops25h 13mUnited Airlines
Mon 1/264:55 pmBKK - SEA
2 stops38h 34mUnited Airlines
Deal found 12/13$936
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Tue 1/271:20 pmBKK - SEA
1 stop20h 20mMultiple Airlines
Deal found 12/12$946
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Mon 1/261:45 pmBKK - SEA
1 stop16h 20mMultiple Airlines
Deal found 12/12$948
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Thu 1/221:45 pmBKK - SEA
1 stop16h 20mMultiple Airlines
Deal found 12/12$954
This oojo deal was found by Cheapflights users on 12/15. 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 12/2812:10 amSEA - BKK
1 stop20h 20mEVA Air
Tue 3/35:15 pmBKK - SEA
1 stop15h 55mEVA Air
Deal found 12/15$966
This oojo deal was found by Cheapflights users on 12/15. 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.
Sat 12/2712:10 amSEA - BKK
1 stop25h 35mChina Airlines
Sat 2/2810:55 amBKK - SEA
1 stop22h 15mChina Airlines
Deal found 12/15$999
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Sun 1/255:50 pmBKK - SEA
1 stop15h 20mMultiple Airlines
Deal found 12/12$1,003
This Kiwi.com deal was found by Cheapflights users on 12/12. 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.
Sat 12/2711:10 pmSEA - BKK
2 stops44h 30mMultiple Airlines
Fri 1/231:45 pmBKK - SEA
1 stop16h 20mMultiple Airlines
Deal found 12/12$1,008
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/1512:35 pmSEA - DMK
1 stop23h 10mMultiple Airlines
Thu 12/189:20 amDMK - SEA
2 stops24h 20mMultiple Airlines
Deal found 12/13$1,264
This Mytrip deal was found by Cheapflights users on 12/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2712:10 amSEA - DMK
2 stops33h 25mMultiple Airlines
Sun 1/47:35 amDMK - SEA
2 stops25h 35mMultiple Airlines
Deal found 12/15$1,273

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 15, 2025.

Round-trip from

$665
(Gotogate)

One-way from

$350
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$1,229
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. 15% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 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 15, 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

Sun 1/25

9:25 am-11:25 am

2 stops35h 00m

Bangkok Suvarnabhumi

Mon 2/2

4:55 pm-11:41 am

2 stops33h 46m

$741

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/28

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 2/24

12:55 am-1:20 pm

1 stop27h 25m

$745

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/27

12:35 pm-11:25 am

2 stops55h 50m

Bangkok Suvarnabhumi

Tue 2/3

4:55 pm-11:29 am

3 stops33h 34m

$745

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

7:15 am-12:45 am

2 stops26h 30m

Bangkok Suvarnabhumi

Wed 2/11

2:05 am-9:00 am

1 stop21h 55m

$752

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/20

7:20 am-11:40 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Sun 5/3

11:30 pm-10:40 am

1 stop25h 10m

$754

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 4/1

7:20 am-11:40 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Sun 4/12

9:50 am-10:40 am

1 stop38h 50m

$754

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/28

7:15 am-12:45 am

2 stops26h 30m

Bangkok Suvarnabhumi

Sun 3/8

11:15 pm-10:00 am

1 stop24h 45m

$754

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/13

7:20 am-11:40 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Tue 4/21

9:40 pm-10:40 am

1 stop27h 00m

$754

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/1

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Tue 2/24

2:05 am-9:00 am

1 stop21h 55m

$755

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/28

11:00 am-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Sat 2/14

11:15 pm-9:00 am

1 stop24h 45m

$755

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 45 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 12, 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 $940). 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 BKK?

Find hourly flight availability from Seattle to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Bangkok in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight at noon.

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

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

Travelers seeking maximum savings on their Seattle to Bangkok flight should consider departing on Tuesday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 15, 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
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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
243 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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
1,296 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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
1,023 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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
791 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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
493 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Food

8.7

Comfort

8.9

Overall

8.9

Entertainment

8.9

Crew

9.2

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?

    United Airlines, Delta, and Korean Air can get you from Seattle to Bangkok in just under 22h 20m. Your travel time can differ by up to 12h 40m. There are 7443 mi between Seattle and Bangkok. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Delta, at $433, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include Singapore Airlines and Philippine Airlines. Delta is 51% 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. Tokyo 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 Lotte World, Dongdaemun Market, and Bukchon Hanok Village. Lotte World, Dongdaemun Market, and Bukchon Hanok Village can be accessed by traveling approximately 35.7 mi, 31.6 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 Tokyo?

    Most Tokyo visitors opt to spend their time at Akihabara Electric Town, Tsukiji Outer Market, and Tokyo Tower. Akihabara Electric Town, Tsukiji Outer Market and Tokyo Tower are located about 10.3 mi, 7.9 mi, and 7.9 mi, respectively from Tokyo Haneda if you are interested in checking them out. Those on a layover in Tokyo in need of a rental car can book one at Tokyo Haneda for about $64.

  • 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. Singapore 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 $940). 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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$884FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$518Average$710FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$605Average$708FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$611Average$685FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$685Average$751FlexibilityNo cancel feeOn-time81%
ANACheapest$694Average$885FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$734Average$835FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$856FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$753Average$921FlexibilityNo cancel feeOn-time69%

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