HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bangkok

$430+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Bangkok with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 1, 2025.

Round-trip from

$785
(StudentUniverse)

One-way from

$430
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,070
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. 5% potential increase in price ($53 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 May 2025
Search Deals

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 May 1, 2025.

This FlightHub deal was found by Cheapflights users on 4/30. 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.
Fri 9/121:15 amSEA - BKK
1 stop20h 45mSTARLUX Airlines
Sun 9/215:50 pmBKK - SEA
1 stop36h 20mSTARLUX Airlines
Deal found 4/30$784
This StudentUniverse deal was found by Cheapflights users on 4/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1412:50 pmSEA - BKK
1 stop18h 55mKorean Air
Thu 8/289:50 amBKK - SEA
2 stops25h 56mKorean Air
Deal found 4/30$785
This United Airlines deal was found by Cheapflights users on 4/30. 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 9/86:45 amSEA - BKK
2 stops31h 50mUnited Airlines
Mon 9/299:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 4/30$789
This FlightHub deal was found by Cheapflights users on 4/29. 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 9/151:45 pmSEA - BKK
2 stops26h 15mANA
Wed 4/17:00 amBKK - SEA
1 stop21h 25mANA
Deal found 4/29$794
This Gurufare deal was found by Cheapflights users on 4/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/97:20 amSEA - BKK
2 stops27h 20mChina Eastern
Sat 5/175:05 amBKK - SEA
2 stops25h 40mChina Eastern
Deal found 4/30$796
This United deal was found by Cheapflights users on 4/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:45 amSEA - BKK
2 stops27h 10mMultiple Airlines
Tue 9/309:35 amBKK - SEA
2 stops23h 01mMultiple Airlines
Deal found 4/30$800
This Delta deal was found by Cheapflights users on 4/30. 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.
Sun 5/1112:40 pmSEA - BKK
1 stop21h 00mDelta
Wed 6/411:30 pmBKK - SEA
1 stop28h 10mDelta
Deal found 4/30$818
This oojo deal was found by Cheapflights users on 4/30. 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 5/52:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Sat 5/101:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 4/30$823
This oojo deal was found by Cheapflights users on 4/30. 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 8/251:40 amSEA - BKK
1 stop20h 30mChina Airlines
Sat 9/132:40 amBKK - SEA
1 stop31h 05mChina Airlines
Deal found 4/30$830
This oojo deal was found by Cheapflights users on 4/29. 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 9/91:30 amSEA - BKK
1 stop19h 40mEVA Air
Tue 11/42:15 amBKK - SEA
1 stop30h 55mEVA Air
Deal found 4/29$854
This oojo deal was found by Cheapflights users on 4/30. 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 9/1711:30 amSEA - BKK
2 stops29h 25mQatar Airways
Tue 9/232:30 amBKK - SEA
2 stops32h 07mQatar Airways
Deal found 4/30$875
This Mytrip deal was found by Cheapflights users on 4/28. 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 8/2610:15 amSEA - DMK
2 stops23h 25mMultiple Airlines
Fri 9/126:30 pmDMK - SEA
2 stops28h 30mMultiple Airlines
Deal found 4/28$955

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 May 1, 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 5/14

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Thu 8/28

9:50 am-9:46 pm

2 stops25h 56m

$785

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 5/9

7:20 am-12:40 am

2 stops27h 20m

Bangkok Suvarnabhumi

Sat 5/17

5:05 am-4:45 pm

2 stops25h 40m

$796

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/4

1:15 am-4:40 pm

1 stop25h 25m

Bangkok Suvarnabhumi

Sun 5/11

5:50 pm-4:10 pm

1 stop36h 20m

$798

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 7/8

1:45 pm-6:00 am

2 stops26h 15m

Bangkok Suvarnabhumi

Tue 9/9

9:35 pm-2:25 pm

1 stop30h 50m

$812

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 7/15

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 9/4

9:35 am-2:25 pm

1 stop18h 50m

$813

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/11

12:40 pm-11:40 pm

1 stop21h 00m

Bangkok Suvarnabhumi

Wed 6/4

11:30 pm-1:40 pm

1 stop28h 10m

$818

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 5/5

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Sat 5/10

1:20 am-12:30 pm

1 stop25h 10m

$823

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 5/7

7:00 am-11:55 pm

2 stops26h 55m

Bangkok Suvarnabhumi

Tue 5/20

7:00 am-6:30 pm

3 stops25h 30m

$866

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 5/6

1:10 am-4:20 pm

1 stop25h 10m

Bangkok Suvarnabhumi

Mon 5/19

2:40 am-7:30 pm

1 stop30h 50m

$877

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 5/9

4:30 pm-7:20 am

1 stop24h 50m

Bangkok Suvarnabhumi

Tue 6/10

8:00 pm-8:00 pm

2 stops38h 00m

$887

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 34 results
1
2
3
4

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 April 25, 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, March is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $955). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,574). 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 May 1, 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.

Rainfall in Bangkok by month

Plan your trip to Bangkok by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bangkok ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

Plan your trip to Bangkok by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bangkok, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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 May 1, 2025.
Read through reviews of airlines operating flights from Seattle to Bangkok, such as STARLUX Airlines, EVA Air and Korean Air. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
161 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,186 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,069 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
ANA
8.3
Very good
852 reviews
STARLUX Airlines
9.1
Wonderful
161 reviews

Overall

9.1

Comfort

9.0

Boarding

9.0

Food

8.9

Crew

9.3

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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. 18 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?

    Korean Air, at $785, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include China Eastern and ANA. Korean Air is 20% 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?

    $430 is the cheapest one-way deal found within the past few days, from Korean Air. You may also be able to find cheap deals on Asiana Airlines and Qatar Airways, with prices starting from $440 and $441, 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 $69 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, Bukchon Hanok Village, and Myeongdong Cathedral. Dongdaemun Market, Bukchon Hanok Village, and Myeongdong Cathedral can be accessed by traveling approximately 31.6 mi, 30.6 mi, and 30.4 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $53 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 $73.

  • 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 San Francisco are the next rarest. Singapore follows San Francisco 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, March is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $955). Flying from Seattle to Bangkok in December is currently the most expensive (average of $1,574). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$441Average$994FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$623Average$807FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$631Average$775FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$829FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$757FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$753Average$854FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
ANACheapest$759Average$926FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,101FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$936FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.