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$278+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Round-trip from

$642
(CrystalTravel)

One-way from

$278
(FlightHub)

Popular in

June

Cheapest in

September

Average price

$794
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. 15% potential increase in price ($161 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 January 2026
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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 January 8, 2026.

This CrystalTravel deal was found by Cheapflights users on 1/6. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2112:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Sat 3/1412:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 1/6$642
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Sun 3/18:45 amSEA - BKK
1 stop38h 50mSingapore Airlines
Fri 4/178:10 pmBKK - SEA
1 stop26h 35mSingapore Airlines
Deal found 1/7$643
This Justfly.com deal was found by Cheapflights users on 1/7. 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.
Sat 3/149:45 amSEA - BKK
1 stop20h 15mSingapore Airlines
Mon 4/612:15 pmBKK - SEA
1 stop34h 30mSingapore Airlines
Deal found 1/7$646
This oojo deal was found by Cheapflights users on 1/8. 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.
Fri 4/1010:15 amSEA - BKK
1 stop38h 05mSingapore Airlines
Mon 4/209:20 amBKK - SEA
1 stop37h 25mSingapore Airlines
Deal found 1/8$650
This CrystalTravel deal was found by Cheapflights users on 1/6. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3112:10 amSEA - BKK
1 stop20h 05mAsiana Airlines
Sun 2/1512:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 1/6$651
This FlightHub deal was found by Cheapflights users on 1/8. 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.
Thu 3/129:45 amSEA - HKT
1 stop19h 40mSingapore Airlines
Sat 3/2110:05 amHKT - SEA
1 stop36h 05mSingapore Airlines
Deal found 1/8$651
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Sat 1/3112:10 amSEA - BKK
1 stop20h 05mAsiana Airlines
Wed 2/1112:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 1/7$656
This FlightHub deal was found by Cheapflights users on 1/8. 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 3/212:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Tue 3/1710:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 1/8$656
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Fri 1/1612:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Mon 4/131:20 amBKK - SEA
1 stop27h 35mAsiana Airlines
Deal found 1/7$657
This FlightHub deal was found by Cheapflights users on 1/6. 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.
Thu 4/912:55 amSEA - HKT
1 stop30h 00mAsiana Airlines
Sun 4/1910:15 pmHKT - SEA
1 stop30h 40mAsiana Airlines
Deal found 1/6$657
This FlightHub deal was found by Cheapflights users on 1/7. 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 1/1912:10 amSEA - BKK
1 stop30h 50mAsiana Airlines
Wed 3/1112:20 pmBKK - SEA
1 stop16h 35mAsiana Airlines
Deal found 1/7$658
This FlightHub deal was found by Cheapflights users on 1/7. 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 1/1912:10 amSEA - HKT
1 stop30h 25mAsiana Airlines
Thu 1/2910:55 pmHKT - SEA
1 stop30h 00mAsiana Airlines
Deal found 1/7$658

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 January 8, 2026.
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

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/3

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Wed 2/11

11:15 pm-1:20 pm

1 stop29h 05m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 3/4

11:30 am-11:20 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Mon 3/16

12:55 am-2:20 pm

1 stop27h 25m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/31

11:25 am-12:55 am

1 stop22h 30m

Bangkok Suvarnabhumi

Fri 2/13

9:30 pm-1:20 pm

1 stop30h 50m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/15

12:35 pm-12:45 am

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 4/14

9:50 am-1:07 pm

1 stop17h 17m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/12

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

Tue 4/21

9:50 am-1:07 pm

1 stop17h 17m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 2/27

11:25 am-11:20 pm

1 stop20h 55m

Bangkok Suvarnabhumi

Sat 3/14

2:05 am-2:20 pm

1 stop26h 15m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/21

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Sun 3/1

9:40 am-9:00 am

1 stop38h 20m

$700

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 4/5

12:55 am-8:55 pm

1 stop30h 00m

Phuket City

Mon 4/13

10:15 pm-2:55 pm

1 stop30h 40m

$700

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 2/9

11:00 am-12:45 am

1 stop22h 45m

Bangkok Suvarnabhumi

Thu 2/19

12:55 am-9:00 am

1 stop23h 05m

$700

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Mon 4/20

12:55 am-8:55 pm

1 stop30h 00m

Phuket City

Sat 4/25

10:15 pm-2:55 pm

1 stop30h 40m

$700

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

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, February is the cheapest month in which you can book a flight from Seattle to Thailand (average of $511). Flying from Seattle to Thailand in May is currently the most expensive (average of $686). 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 January 8, 2026.

One of the essential ways to save on airfare from Seattle to Thailand is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 33% on airfare.

What is the cheapest day to fly from Seattle to Thailand?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Thailand. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Seattle to Thailand flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 January 8, 2026.
Read through reviews of airlines operating flights from Seattle to Thailand, such as STARLUX Airlines, EVA Air, and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
258 reviews
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
EVA Air
8.4
Very good
1,314 reviews
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
China Airlines
8.3
Very good
798 reviews
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Asiana Airlines
8.2
Very good
499 reviews
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Singapore Airlines
8.1
Very good
1,429 reviews
STARLUX Airlines
8.9
Very good
258 reviews

Comfort

8.8

Entertainment

8.8

Food

8.6

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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.

  • How long is the flight from Seattle to Thailand?

    For as low as $697, Delta can have you in Thailand from Seattle in 22h 20m. The distance between Seattle and Thailand is about 7443 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $280 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on Philippine Airlines and Asiana Airlines, with prices starting from $301 and $348, respectively.

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

    While some choose either Seattle/Tacoma Intl - Bangkok Don Mueang Intl or Seattle/Tacoma Intl - Chiang Mai, 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, February is the cheapest month in which you can book a flight from Seattle to Thailand (average of $511). Flying from Seattle to Thailand in May is currently the most expensive (average of $686). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$174Average$701FlexibilityNo cancel feeOn-time60%
DeltaCheapest$433Average$957FlexibilityNo cancel feeOn-timeN/A
Singapore AirlinesCheapest$517Average$948FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$612Average$778FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$673Average$835FlexibilityNo cancel feeOn-time81%
ANACheapest$684Average$883FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$700Average$917FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$730Average$823FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$856FlexibilityNo cancel feeOn-timeN/A

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