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$422+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Round-trip from

$777
(Delta)

One-way from

$428
(oojo)

Popular in

December

Cheapest in

February

Average price

$846
From Seattle/Tacoma Intl to Thailand
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One-way flight from Seattle/Tacoma Intl to Thailand
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($47 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 April 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 April 17, 2025.

This FlightHub deal was found by Cheapflights users on 4/17. 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 9/210:15 amSEA - HKT
1 stop19h 05mSingapore Airlines
Fri 10/3110:05 amHKT - SEA
1 stop36h 05mSingapore Airlines
Deal found 4/17$621
This oojo deal was found by Cheapflights users on 4/17. 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 8/311:40 amSEA - CNX
1 stop18h 40mChina Airlines
Tue 9/1611:20 amCNX - SEA
1 stop22h 00mChina Airlines
Deal found 4/17$742
This oojo deal was found by Cheapflights users on 4/17. 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 stop21h 55mChina Airlines
Sun 12/75:50 pmBKK - SEA
1 stop15h 25mChina Airlines
Deal found 4/17$779
This Gurufare deal was found by Cheapflights users on 4/17. 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.
Thu 4/242:15 pmSEA - BKK
1 stop18h 55mAsiana Airlines
Mon 5/191:20 amBKK - SEA
1 stop25h 10mAsiana Airlines
Deal found 4/17$780
This Korean Air deal was found by Cheapflights users on 4/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2412:50 pmSEA - BKK
1 stop34h 25mKorean Air
Sat 5/2411:30 pmBKK - SEA
1 stop25h 10mKorean Air
Deal found 4/17$781
This FlightHub deal was found by Cheapflights users on 4/17. 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 9/104:30 pmSEA - BKK
1 stop33h 00mANA
Mon 9/229:35 amBKK - SEA
2 stops23h 01mANA
Deal found 4/17$784
This Gurufare deal was found by Cheapflights users on 4/17. 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.
Thu 5/16:10 amSEA - BKK
2 stops28h 30mChina Eastern
Fri 5/169:55 pmBKK - SEA
2 stops32h 50mChina Eastern
Deal found 4/17$796
This Gurufare deal was found by Cheapflights users on 4/17. 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 9/2610:15 amSEA - BKK
1 stop19h 45mSingapore Airlines
Sun 10/126:30 pmBKK - SEA
1 stop52h 15mSingapore Airlines
Deal found 4/17$802
This United Airlines deal was found by Cheapflights users on 4/17. 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 8/137:00 amSEA - BKK
2 stops26h 55mUnited Airlines
Tue 9/29:35 amBKK - SEA
2 stops27h 34mUnited Airlines
Deal found 4/17$803
This Trip.com deal was found by Cheapflights users on 4/17. 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 4/279:50 amSEA - BKK
1 stop20h 10mMultiple Airlines
Tue 5/66:40 pmBKK - SEA
1 stop38h 35mMultiple Airlines
Deal found 4/17$807
This Expedia deal was found by Cheapflights users on 4/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/43:40 pmSEA - HKT
2 stops36h 20mMultiple Airlines
Tue 11/189:50 pmHKT - SEA
2 stops30h 30mMultiple Airlines
Deal found 4/17$817
This Trip.com deal was found by Cheapflights users on 4/16. 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 10/121:10 amSEA - CNX
2 stops22h 30mMultiple Airlines
Mon 10/206:30 amCNX - SEA
2 stops26h 50mMultiple Airlines
Deal found 4/16$831

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 April 17, 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

Sun 8/31

1:40 am-10:20 am

1 stop18h 40m

Chiang Mai

Tue 9/16

11:20 am-7:20 pm

1 stop22h 00m

$742

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 8/28

1:40 am-9:45 am

1 stop18h 05m

Bangkok Suvarnabhumi

Fri 9/5

2:40 am-7:45 pm

1 stop31h 05m

$779

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/28

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Sun 5/18

1:20 am-12:30 pm

1 stop25h 10m

$780

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/28

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 5/20

11:30 pm-10:40 am

1 stop25h 10m

$781

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/10

4:30 pm-3:30 pm

1 stop33h 00m

Bangkok Suvarnabhumi

Mon 9/22

9:35 am-6:36 pm

2 stops23h 01m

$784

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/18

11:35 pm-12:15 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Fri 5/23

1:30 pm-7:15 pm

1 stop19h 45m

$789

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 5/1

6:10 am-12:40 am

2 stops28h 30m

Bangkok Suvarnabhumi

Fri 5/16

9:55 pm-4:45 pm

2 stops32h 50m

$796

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/26

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Sun 10/12

6:30 pm-8:45 am

1 stop52h 15m

$802

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 8/13

7:00 am-11:55 pm

2 stops26h 55m

Bangkok Suvarnabhumi

Tue 9/2

9:35 am-11:09 pm

2 stops27h 34m

$803

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/27

9:50 am-8:00 pm

1 stop20h 10m

Bangkok Suvarnabhumi

Tue 5/6

6:40 pm-7:15 pm

1 stop38h 35m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 $958). 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 April 17, 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 April 17, 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
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
154 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,177 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,064 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Japan Airlines
8.3
Very good
1,440 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
ANA
8.3
Very good
844 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

Food

8.9

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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?

    $428 is the cheapest one-way deal found within the past few days, from China Airlines. You may also be able to find cheap deals on Korean Air and ANA, with prices starting from $431 and $440, respectively.

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

    While some choose either Seattle/Tacoma Intl - Phuket City 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 $958). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$539Average$1,125FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$622Average$879FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$631Average$818FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$695Average$1,022FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$710Average$759FlexibilityNo cancel feeOn-time60%
China AirlinesCheapest$749Average$844FlexibilityNo cancel feeOn-time70%
China EasternCheapest$755Average$872FlexibilityNo cancel feeOn-time62%
ANACheapest$760Average$931FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$773Average$1,120FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$786Average$952FlexibilityNo cancel feeOn-time69%

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