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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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Bangkok are usually found in February or March, booked 61 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap 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 August 14, 2025.

Round-trip from

$681
(CrystalTravel)

One-way from

$350
(CrystalTravel)

Popular in

December

Cheapest in

February

Average price

$842
From Seattle/Tacoma Intl to Bangkok
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One-way flight from Seattle/Tacoma Intl to Bangkok
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Highest demand for flights based on searches. 6% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 14, 2025.

This CrystalTravel deal was found by Cheapflights users on 8/13. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/294:40 pmSEA - BKK
1 stop23h 50mANA
Thu 11/279:25 amBKK - SEA
1 stop18h 55mANA
Deal found 8/13$681
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2612:10 amSEA - BKK
1 stop31h 55mAsiana Airlines
Wed 11/2611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 8/13$683
This oojo deal was found by Cheapflights users on 8/12. 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 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
Tue 12/231:20 pmBKK - SEA
1 stop20h 15mPhilippine Airlines
Deal found 8/12$684
This CrystalTravel deal was found by Cheapflights users on 8/12. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2710:00 amSEA - BKK
2 stops28h 35mANA
Wed 9/107:00 amBKK - SEA
2 stops22h 14mANA
Deal found 8/12$686
This Mytrip deal was found by Cheapflights users on 8/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/262:30 pmSEA - BKK
1 stop18h 40mAsiana Airlines
Wed 9/311:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 8/12$687
This CrystalTravel deal was found by Cheapflights users on 8/13. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:00 amSEA - BKK
2 stops26h 55mANA
Wed 9/109:35 amBKK - SEA
1 stop18h 50mANA
Deal found 8/13$688
This FlightHub deal was found by Cheapflights users on 8/13. 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.
Tue 11/48:45 amSEA - BKK
1 stop20h 15mSingapore Airlines
Mon 12/89:10 pmBKK - SEA
1 stop25h 00mSingapore Airlines
Deal found 8/13$690
This Gotogate deal was found by Cheapflights users on 8/14. 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.
Thu 8/282:30 pmSEA - BKK
1 stop18h 40mAsiana Airlines
Sun 8/3111:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 8/14$692
This iWofly deal was found by Cheapflights users on 8/13. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:10 amSEA - BKK
2 stops27h 35mKorean Air
Wed 11/2611:15 pmBKK - SEA
1 stop24h 45mKorean Air
Deal found 8/13$693
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:55 pmSEA - BKK
1 stop20h 30mDelta
Tue 9/22:35 amBKK - SEA
1 stop25h 05mDelta
Deal found 8/14$695
This iWofly deal was found by Cheapflights users on 8/14. 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.
Tue 10/2112:50 pmSEA - BKK
1 stop18h 55mKorean Air
Tue 12/91:00 amBKK - SEA
1 stop23h 00mKorean Air
Deal found 8/14$696
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/155:30 amSEA - DMK
2 stops26h 45mMultiple Airlines
Mon 9/228:10 amDMK - SEA
2 stops25h 10mMultiple Airlines
Deal found 8/13$988

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 August 14, 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

Tue 9/9

12:35 pm-1:05 am

1 stop22h 30m

Bangkok Suvarnabhumi

Tue 9/16

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/9

12:35 pm-1:05 am

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 9/22

11:30 pm-1:40 pm

1 stop28h 10m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/25

12:55 pm-9:45 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Mon 9/8

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/29

12:35 pm-9:45 pm

1 stop19h 10m

Bangkok Suvarnabhumi

Thu 10/16

9:50 am-1:30 pm

1 stop17h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/29

12:35 pm-9:45 pm

1 stop19h 10m

Bangkok Suvarnabhumi

Wed 10/15

9:40 pm-1:30 pm

1 stop29h 50m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/26

12:55 pm-9:45 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Thu 9/11

9:50 am-1:40 pm

1 stop17h 50m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/28

12:55 pm-9:45 pm

1 stop18h 50m

Bangkok Suvarnabhumi

Sun 9/7

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 9/4

12:35 pm-9:45 pm

1 stop19h 10m

Bangkok Suvarnabhumi

Mon 9/22

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/8

12:35 pm-9:45 pm

1 stop19h 10m

Bangkok Suvarnabhumi

Wed 9/17

9:40 pm-1:40 pm

1 stop30h 00m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/3

12:35 pm-9:45 pm

1 stop19h 10m

Bangkok Suvarnabhumi

Wed 9/17

9:40 pm-1:40 pm

1 stop30h 00m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 August 8, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Bangkok, you should look to book at least 61 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, September is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $938). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,552). 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 August 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Bangkok in the morning. If you’re flexible enough to do this you can expect to save up to 9% 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 evenings 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 August 14, 2025.
Read reviews from past customers who have flown EVA Air, ANA, and Korean Air 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.
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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
1,233 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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
933 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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
Korean Air
8.4
Very good
1,131 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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
762 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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
473 reviews
EVA Air
8.4
Very good
1,233 reviews

Boarding

8.4

Entertainment

8.0

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

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 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.

  • 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 Asiana Airlines. Delta is 53% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 $70 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 $75 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 $60.

  • 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, September is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $938). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,552). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$911FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$539Average$757FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$634Average$755FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$684Average$764FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$700Average$756FlexibilityNo cancel feeOn-time60%
ANACheapest$720Average$897FlexibilityNo cancel feeOn-time80%
STARLUX AirlinesCheapest$740Average$888FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$749Average$863FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$878FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,087FlexibilityNo cancel feeOn-time77%

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