HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Thailand

$352+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
feb. 19 — feb. 261
jue. 2/19
jue. 2/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Thailand 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.

Cheap 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 enero 20, 2026.

This Trip.com deal was found by Cheapflights users on 1/18. 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.
dom. 3/159:45 am
SEA
-
HKT
1 stop19h 40m
Singapore Airlines
mié. 3/258:15 pm
HKT
-
SEA
1 stop25h 55m
Singapore Airlines
Deal found 1/18$641
This oojo deal was found by Cheapflights users on 1/17. 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.
vie. 3/139:45 am
SEA
-
BKK
1 stop38h 50m
Singapore Airlines
vie. 3/2012:00 pm
BKK
-
SEA
1 stop34h 10m
Singapore Airlines
Deal found 1/17$644
This oojo deal was found by Cheapflights users on 1/19. 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.
mar. 4/2810:15 am
SEA
-
HKT
1 stop32h 30m
Singapore Airlines
jue. 5/78:10 pm
HKT
-
SEA
1 stop26h 35m
Singapore Airlines
Deal found 1/19$644
This CrystalTravel deal was found by Cheapflights users on 1/20. 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.
sáb. 3/712:10 am
SEA
-
BKK
1 stop30h 50m
Asiana Airlines
lun. 3/2312:20 pm
BKK
-
SEA
1 stop16h 35m
Asiana Airlines
Deal found 1/20$645
This oojo deal was found by Cheapflights users on 1/18. 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.
sáb. 3/78:45 am
SEA
-
BKK
1 stop38h 50m
Singapore Airlines
vie. 3/1312:00 pm
BKK
-
SEA
1 stop34h 10m
Singapore Airlines
Deal found 1/18$646
This oojo deal was found by Cheapflights users on 1/20. 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.
jue. 2/198:45 am
SEA
-
BKK
1 stop41h 15m
Singapore Airlines
jue. 3/128:00 pm
BKK
-
SEA
1 stop26h 10m
Singapore Airlines
Deal found 1/20$648
This oojo deal was found by Cheapflights users on 1/19. 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.
jue. 3/58:45 am
SEA
-
HKT
1 stop34h 25m
Singapore Airlines
jue. 3/1210:05 am
HKT
-
SEA
1 stop36h 05m
Singapore Airlines
Deal found 1/19$650
This oojo deal was found by Cheapflights users on 1/20. 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.
dom. 2/112:10 am
SEA
-
BKK
1 stop20h 05m
Asiana Airlines
sáb. 3/711:55 pm
BKK
-
SEA
1 stop29h 00m
Asiana Airlines
Deal found 1/20$652
This CrystalTravel deal was found by Cheapflights users on 1/18. 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.
sáb. 1/2412:10 am
SEA
-
BKK
1 stop30h 50m
Asiana Airlines
sáb. 2/712:20 pm
BKK
-
SEA
1 stop16h 35m
Asiana Airlines
Deal found 1/18$653
This oojo deal was found by Cheapflights users on 1/18. 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.
dom. 3/18:45 am
SEA
-
BKK
1 stop43h 00m
Singapore Airlines
lun. 3/96:25 pm
BKK
-
SEA
1 stop27h 45m
Singapore Airlines
Deal found 1/18$654
This FlightHub deal was found by Cheapflights users on 1/17. 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.
lun. 1/1912:10 am
SEA
-
BKK
1 stop30h 50m
Asiana Airlines
vie. 1/3011:55 pm
BKK
-
SEA
1 stop29h 00m
Asiana Airlines
Deal found 1/17$655
This oojo deal was found by Cheapflights users on 1/18. 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.
dom. 2/112:10 am
SEA
-
BKK
1 stop20h 05m
Asiana Airlines
lun. 2/912:20 pm
BKK
-
SEA
1 stop16h 35m
Asiana Airlines
Deal found 1/18$656

Find flight deals from Seattle to Thailand

Keep the following information in mind while searching for Seattle to Thailand flight deals. Data was last updated enero 20, 2026.

Round-trip from

$644
(oojo)

One-way from

$352
(SmartFares)

Popular in

June

Cheapest in

September

Average price

$789
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. 14% potential increase in price ($153 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 January 2026
Search Deals

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 enero 20, 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

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

dom. 3/15

9:45 am-7:25 pm

1 stop19h 40m

Phuket City

mié. 3/25

8:15 pm-8:10 am

1 stop25h 55m

$641

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

jue. 3/5

8:45 am-10:10 am

1 stop34h 25m

Phuket City

jue. 3/12

10:05 am-8:10 am

1 stop36h 05m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

dom. 2/1

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

mié. 2/11

11:15 pm-1:20 pm

1 stop29h 05m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

vie. 5/1

7:15 am-11:40 pm

2 stops26h 25m

Bangkok Suvarnabhumi

mar. 5/12

11:30 pm-10:40 am

1 stop25h 10m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

sáb. 4/25

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

vie. 5/15

9:40 pm-1:11 pm

1 stop29h 31m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

sáb. 4/25

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

sáb. 5/9

9:40 pm-1:11 pm

1 stop29h 31m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 4/28

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

sáb. 5/9

9:40 pm-1:11 pm

1 stop29h 31m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

mar. 2/3

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

mar. 2/10

2:05 am-1:20 pm

1 stop26h 15m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

dom. 4/26

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

jue. 5/14

9:50 am-1:11 pm

1 stop17h 21m

$697

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

jue. 4/30

1:00 pm-11:40 pm

1 stop20h 40m

Bangkok Suvarnabhumi

dom. 5/10

9:40 pm-1:11 pm

1 stop29h 31m

$697

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 60 results
1
2
3
...
6

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 $512). 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 enero 20, 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 enero 20, 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
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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
268 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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
1,327 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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
799 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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
8.1
Very good
501 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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
1,434 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Boarding

8.9

Crew

9.1

Food

8.6

Overall

8.9

Comfort

8.8

Entertainment

8.8

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 $641, Singapore Airlines can have you in Thailand from Seattle in 19h 40m. The distance between Seattle and Thailand is about 7860 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 - Phuket City, 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 $512). 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

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

Alternative routes for Seattle to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Narita flights
Seattle to Haneda flights
Seattle to Suvarnabhumi flights
Seattle to Manila flights
Seattle to Incheon Intl flights
Seattle to New Delhi flights
Seattle to Taiwan Taoyuan Intl flights
Portland to Narita flights
Portland to Haneda flights
Seattle to Hongqiao Intl flights
Seattle to Hong Kong flights
Seattle to Pu Dong flights
Seattle to Ho Chi Minh City flights
Seattle to Sung Shan flights
Seattle to Gimpo Intl flights
Portland to Suvarnabhumi flights
Seattle to Denpasar flights
Seattle to Kansai Intl flights
Seattle to Mumbai flights
Seattle to Da Nang flights
Seattle to Kuala Lumpur Intl flights
Seattle to Kobe flights
Seattle to Bangalore flights
Seattle to Osaka Itami flights
Portland to Hong Kong flights
Seattle to Chennai flights
Seattle to Hyderabad flights
Seattle to Don Mueang Intl flights
Seattle to Capital flights
Portland to Incheon Intl flights
Seattle to Singapore flights
Seattle to Soekarno-Hatta Intl flights
Seattle to Beijing Daxing Intl flights
Seattle to Chitose flights
Seattle to Ahmedabad flights
Seattle to Cebu City flights
Portland to Ho Chi Minh City flights
Portland to Kathmandu flights
Seattle to Kathmandu flights
Portland to Denpasar flights
Portland to Manila flights
Seattle to Chubu Centrair Intl flights
Seattle to Phuket City flights
Portland to Gimpo Intl flights
Portland to Kuala Lumpur Intl flights
Portland to New Delhi flights
Seattle to Okinawa flights
Portland to Kansai Intl flights
Seattle to Colombo flights
Portland to Taiwan Taoyuan Intl flights

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 enero 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$154Average$701FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$418Average$825FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$520Average$947FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$614Average$784FlexibilityNo cancel feeOn-time76%
ANACheapest$683Average$886FlexibilityNo cancel feeOn-time80%
DeltaCheapest$694Average$959FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$700Average$905FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$730Average$819FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$735Average$880FlexibilityNo cancel feeOn-time72%
STARLUX AirlinesCheapest$740Average$855FlexibilityNo cancel feeOn-timeN/A

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.