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$330+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Bangkok are usually found in February or September, 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 September 25, 2025.

Round-trip from

$663
(Gotogate)

One-way from

$330
(SmartFares)

Popular in

December

Cheapest in

February

Average price

$782
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 ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 25, 2025.

This Gotogate deal was found by Cheapflights users on 9/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:10 amSEA - BKK
1 stop30h 55mAsiana Airlines
Sun 11/3011:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/24$663
This oojo deal was found by Cheapflights users on 9/23. 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 10/511:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Tue 10/1411:20 pmBKK - SEA
1 stop33h 55mPhilippine Airlines
Deal found 9/23$665
This oojo deal was found by Cheapflights users on 9/24. 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.
Mon 11/1711:00 amSEA - BKK
1 stop19h 30mKorean Air
Tue 11/2512:55 amBKK - SEA
1 stop23h 05mKorean Air
Deal found 9/24$666
This oojo deal was found by Cheapflights users on 9/24. 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.
Sun 11/239:30 pmSEA - BKK
1 stop34h 30mPhilippine Airlines
Sun 12/71:20 pmBKK - SEA
1 stop20h 20mPhilippine Airlines
Deal found 9/24$667
This FlightHub deal was found by Cheapflights users on 9/23. 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 9/292:15 pmSEA - BKK
1 stop30h 40mAsiana Airlines
Mon 10/1311:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 9/23$668
This iWofly deal was found by Cheapflights users on 9/24. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/192:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 10/2712:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 9/24$669
This oojo deal was found by Cheapflights users on 9/23. 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 11/2212:10 amSEA - BKK
1 stop20h 05mAsiana Airlines
Sun 12/712:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 9/23$670
This oojo deal was found by Cheapflights users on 9/23. 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 11/259:30 pmSEA - BKK
1 stop23h 30mPhilippine Airlines
Sat 12/611:50 pmBKK - SEA
1 stop33h 50mPhilippine Airlines
Deal found 9/23$671
This Gotogate deal was found by Cheapflights users on 9/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/192:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sun 10/2611:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/24$672
This oojo deal was found by Cheapflights users on 9/23. 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 11/2212:10 amSEA - BKK
1 stop30h 55mAsiana Airlines
Sun 11/3011:55 pmBKK - SEA
1 stop29h 00mAsiana Airlines
Deal found 9/23$673
This oojo deal was found by Cheapflights users on 9/23. 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 10/2812:00 pmSEA - BKK
1 stop21h 20mKorean Air
Sat 11/812:55 amBKK - SEA
1 stop23h 05mKorean Air
Deal found 9/23$674
This FlightHub deal was found by Cheapflights users on 9/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2211:35 pmSEA - BKK
1 stop22h 40mPhilippine Airlines
Tue 12/911:50 pmBKK - SEA
1 stop33h 50mPhilippine Airlines
Deal found 9/24$676

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 September 25, 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 1/18

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Tue 2/10

11:55 pm-1:55 pm

1 stop29h 00m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/21

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Sat 2/14

9:40 am-1:20 pm

1 stop18h 40m

$692

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/16

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Mon 2/9

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/10

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 3/3

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 2/9

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Tue 3/3

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 12/2

11:30 am-12:45 am

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 12/15

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/17

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Sat 2/14

9:40 am-1:20 pm

1 stop18h 40m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

7:20 am-12:45 am

2 stops26h 25m

Bangkok Suvarnabhumi

Sun 2/15

9:30 pm-9:00 am

1 stop26h 30m

$696

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/23

11:00 am-1:25 pm

1 stop35h 25m

Bangkok Suvarnabhumi

Sat 12/6

12:55 am-9:00 am

1 stop23h 05m

$699

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/15

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Fri 1/30

12:55 am-9:00 am

1 stop23h 05m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/24

Showing 1-10 of 38 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 September 19, 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 $894). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,495). 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 September 25, 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 September 25, 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
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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
1,242 reviews
EVA Air
8.4
Very good
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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
972 reviews
EVA Air
8.4
Very good
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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
1,143 reviews
EVA Air
8.4
Very good
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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
767 reviews
EVA Air
8.4
Very good
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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
483 reviews
EVA Air
8.4
Very good
1,242 reviews

Boarding

8.4

Crew

8.6

Overall

8.4

Comfort

8.3

Food

8.0

Entertainment

8.0

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. 17 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?

    Asiana Airlines and Delta can get you from Seattle to Bangkok in just under 22h 20m. Your travel time can differ by up to 8h 35m. 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 52% 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?

    $354 is the cheapest one-way deal found within the past few days, from Asiana Airlines. You may also be able to find cheap deals on Delta and Korean Air, with prices starting from $372 and $374, 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, Raohe Street Night Market, and Shilin 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, Raohe Street Night Market, or Shilin Night Market can do so by traveling 21.0 mi, 21.6 mi, and 18.3 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 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 $58 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 $57.

  • 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 $894). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,495). 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 September 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$433Average$900FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$523Average$732FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$605Average$752FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$627Average$718FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$673Average$761FlexibilityNo cancel feeOn-time81%
ANACheapest$713Average$897FlexibilityNo cancel feeOn-time80%
STARLUX AirlinesCheapest$742Average$873FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$744Average$855FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$876FlexibilityNo cancel feeOn-time62%
Turkish AirlinesCheapest$773Average$1,097FlexibilityNo cancel feeOn-time77%

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