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$431+ Cheap flights from Seattle (SEA) to Thailand

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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
May 12 — May 191
Mon 5/12
Mon 5/19
1 adult, Economy
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Cheap flight deals from Seattle to Thailand

Keep the following information in mind while searching for Seattle to Thailand flight deals. Data was last updated May 7, 2025.

Round-trip from

$618
(Justfly.com)

One-way from

$434
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,059
From Seattle/Tacoma Intl to Thailand
Search Deals
One-way flight from Seattle/Tacoma Intl to Thailand
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($52 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 May 2025
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Find flight deals from Seattle to Thailand

Cheapest flights from Seattle to Thailand
Explore the most affordable flight options available from Seattle to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 7, 2025.

This Justfly.com deal was found by Cheapflights users on 5/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/210:15 amSEA - HKT
1 stop37h 55mSingapore Airlines
Fri 10/318:40 amHKT - SEA
1 stop37h 30mSingapore Airlines
Deal found 5/7$618
This FlightHub deal was found by Cheapflights users on 5/7. 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 9/12:15 pmSEA - CNX
1 stop19h 25mAsiana Airlines
Mon 9/1512:45 amCNX - SEA
1 stop25h 45mAsiana Airlines
Deal found 5/7$736
This oojo deal was found by Cheapflights users on 5/6. 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 8/311:15 amSEA - CNX
1 stop25h 05mSTARLUX Airlines
Tue 9/165:20 pmCNX - SEA
1 stop36h 50mSTARLUX Airlines
Deal found 5/6$761
This United Airlines deal was found by Cheapflights users on 5/7. 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 7/95:10 pmSEA - BKK
2 stops45h 25mUnited Airlines
Tue 9/29:35 amBKK - SEA
1 stop18h 50mUnited Airlines
Deal found 5/7$790
This StudentUniverse deal was found by Cheapflights users on 5/6. 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.
Tue 8/127:20 amSEA - BKK
2 stops27h 45mKorean Air
Mon 8/252:35 amBKK - SEA
2 stops28h 19mKorean Air
Deal found 5/6$791
This FlightHub deal was found by Cheapflights users on 5/6. 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 8/181:45 pmSEA - BKK
2 stops26h 15mANA
Wed 8/277:00 amBKK - SEA
2 stops22h 14mANA
Deal found 5/6$792
This oojo deal was found by Cheapflights users on 5/6. 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 8/142:30 pmSEA - BKK
1 stop18h 40mAsiana Airlines
Wed 9/311:55 amBKK - SEA
1 stop38h 35mAsiana Airlines
Deal found 5/6$797
This oojo deal was found by Cheapflights users on 5/6. 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 11/2512:10 amSEA - BKK
1 stop18h 40mChina Airlines
Tue 12/235:50 pmBKK - SEA
1 stop15h 25mChina Airlines
Deal found 5/6$799
This KAYAK deal was found by Cheapflights users on 5/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:55 pmSEA - BKK
1 stop30h 55mPhilippine Airlines
Fri 11/281:30 pmBKK - SEA
1 stop21h 05mPhilippine Airlines
Deal found 5/6$810
This FlightHub deal was found by Cheapflights users on 5/6. 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.
Sun 8/101:15 amSEA - BKK
1 stop20h 45mSTARLUX Airlines
Wed 8/271:10 pmBKK - SEA
1 stop17h 25mSTARLUX Airlines
Deal found 5/6$813
This Gurufare deal was found by Cheapflights users on 5/7. 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 9/1910:15 amSEA - BKK
1 stop31h 50mSingapore Airlines
Sun 10/56:30 pmBKK - SEA
1 stop52h 15mSingapore Airlines
Deal found 5/7$815
This Orbitz deal was found by Cheapflights users on 5/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:30 pmSEA - HKT
2 stops27h 05mMultiple Airlines
Mon 11/109:50 pmHKT - SEA
2 stops30h 30mMultiple Airlines
Deal found 5/6$817

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Thailand 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 7, 2025.
Use the filters below to find and compare flights from Seattle to Thailand that are best for you.

Fly from

Seattle

Fly to

Thailand

Route

Depart

Return

Price

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Mon 9/15

12:45 am-12:30 pm

1 stop25h 45m

$736

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/31

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Tue 9/16

5:20 pm-4:10 pm

1 stop36h 50m

$761

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 7/9

5:10 pm-4:35 am

2 stops45h 25m

Bangkok Suvarnabhumi

Tue 9/2

9:35 am-2:25 pm

1 stop18h 50m

$790

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/12

7:20 am-1:05 am

2 stops27h 45m

Bangkok Suvarnabhumi

Mon 8/25

2:35 am-4:54 pm

2 stops28h 19m

$791

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/18

1:45 pm-6:00 am

2 stops26h 15m

Bangkok Suvarnabhumi

Wed 8/27

7:00 am-3:14 pm

2 stops22h 14m

$792

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/14

2:30 pm-11:10 pm

1 stop18h 40m

Bangkok Suvarnabhumi

Wed 9/3

11:55 am-12:30 pm

1 stop38h 35m

$797

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/31

1:40 am-9:45 am

1 stop18h 05m

Bangkok Suvarnabhumi

Sun 9/14

2:40 am-7:45 pm

1 stop31h 05m

$801

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/10

1:15 am-12:00 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Wed 8/27

1:10 pm-4:35 pm

1 stop17h 25m

$813

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/19

10:15 am-8:05 am

1 stop31h 50m

Bangkok Suvarnabhumi

Sun 10/5

6:30 pm-8:45 am

1 stop52h 15m

$815

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 10/24

12:25 pm-9:45 pm

1 stop19h 20m

Bangkok Suvarnabhumi

Thu 10/30

9:40 am-2:05 pm

1 stop18h 25m

$819

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 60 results
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Best time to book a flight from Seattle to Thailand

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

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

Currently, March is the cheapest month in which you can book a flight from Seattle to Thailand (average of $955). Flying from Seattle to Thailand 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 TH?

Find hourly flight availability from Seattle to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 7, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Thailand as you normally would.

Rainfall in Thailand by month

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

In terms of precipitation, rainfall in Thailand 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 Thailand when rainfall is around 0.4 in.

Temperature in Thailand by month

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

If weather is an important factor for your trip to Thailand, 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 Thailand

Get insights into the airlines that provide service to Thailand. 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 Thailand. Reviews last updated May 7, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air and Korean Air from Seattle to Thailand. 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
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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
166 reviews
STARLUX Airlines
9.1
Wonderful
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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
1,190 reviews
STARLUX Airlines
9.1
Wonderful
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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
1,068 reviews
STARLUX Airlines
9.1
Wonderful
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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.
Japan Airlines
8.3
Very good
1,468 reviews
STARLUX Airlines
9.1
Wonderful
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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
166 reviews

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

9.1

Crew

9.3

Food

8.9

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 Thailand. 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 Thailand?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Thailand from Seattle.

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

    $434 is the cheapest one-way deal found within the past few days, from Japan Airlines. You may also be able to find cheap deals on Asiana Airlines and United Airlines, with prices starting from $436 and $437, respectively.

  • What are the most popular routes from Seattle to Thailand?

    While some choose either Seattle/Tacoma Intl - Chiang Mai or Seattle/Tacoma Intl - Bangkok Don Mueang Intl, Seattle/Tacoma Intl - Bangkok Suvarnabhumi is the most popular route from Seattle to Thailand.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Seattle to Thailand (average of $955). Flying from Seattle to Thailand 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

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Alternative routes for Seattle to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Seattle to Thailand

Discover the top 10 airlines that operate flights from Seattle to Thailand. 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 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$457Average$1,099FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$621Average$982FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$630Average$815FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$991FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$757FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$736Average$835FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
ANACheapest$759Average$924FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,097FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$933FlexibilityNo cancel feeOn-time69%

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