What is the cheapest airline that flies from Seattle/Tacoma Intl to Thailand?

Singapore Airlines, Hainan Airlines, and Korean Air are the most popular carriers operating from Seattle/Tacoma Intl to Thailand

What airlines fly to Thailand?

Singapore Airlines, EVA Air and Asiana Airlines are the top three most popular airlines that fly to Thailand from Seattle according to our data. Singapore Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 17 different airlines that fly to Thailand on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Thailand?

Prices for flights from Seattle/Tacoma Intl Airport to Thailand were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Thailand?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Thailand is 17 as of October 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Thailand?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Thailand.

What documentation or ID do you need to fly to Thailand?

The required travel and health documents for your Thailand trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Thailand. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$297 Cheap Flights from Seattle to Thailand in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Thailand

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 am - 5:10 pmSEA Seattle/Tacoma Intl-HKT Phuket City

41h 30m1 stop Singapore Changi

8:40 am - 7:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

37h 25m1 stop Singapore Changi

$658Singapore Airlines

Tue, Feb 23 - Tue, Mar 2

8:40 am - 5:10 pmSEA Seattle/Tacoma Intl-HKT Phuket City

41h 30m1 stop Singapore Changi

8:25 pm - 7:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

25h 40m1 stop Singapore Changi

$673Singapore Airlines

Sun, Jan 10 - Tue, Jan 19

9:30 pm - 8:55 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 25m1 stop Manila Ninoy Aquino Intl

11:40 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Manila Ninoy Aquino Intl

$778Philippine Airlines

Sun, Nov 1 - Sat, Nov 14

10:20 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 00m1 stop Beijing Capital

11:50 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 15m1 stop Chongqing Jiangbei Intl

$788Hainan Airlines

Tue, Nov 24 - Wed, Dec 23

10:20 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 00m1 stop Beijing Capital

1:05 am - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 15m1 stop Beijing Capital

$788Hainan Airlines

Tue, Nov 10 - Mon, Nov 23

9:30 pm - 12:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

23h 35m1 stop Manila Ninoy Aquino Intl

11:40 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Manila Ninoy Aquino Intl

$796Philippine Airlines

Wed, Nov 25 - Wed, Dec 2

11:00 am - 9:30 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

19h 30m1 stop Incheon Intl

9:40 pm - 9:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

26h 25m1 stop Incheon Intl

$808Korean Air

Mon, Mar 1 - Mon, Mar 8

7:20 am - 11:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

24h 45m2 stops San Francisco Incheon Intl

1:05 am - 9:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 00m1 stop Incheon Intl

$809Korean Air

Mon, Mar 1 - Sun, Mar 7

12:40 pm - 12:20 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 40m1 stop Incheon Intl

1:05 am - 11:51 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 46m1 stop Incheon Intl

$818Delta

Wed, Jan 13 - Tue, Jan 19

12:40 pm - 12:20 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 40m1 stop Incheon Intl

9:50 am - 1:20 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

17h 30m1 stop Incheon Intl

$818Delta

Thu, Jan 21 - Tue, May 25

Cheap last minute flights

Enter your travel dates to find the best prices.

11:10 pm - 8:55 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

19h 45m1 stop Manila Ninoy Aquino Intl

11:40 pm - 8:05 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 25m1 stop Manila Ninoy Aquino Intl

$796Philippine Airlines

Sun, Oct 11 - Mon, Oct 19

9:55 am - 5:50 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 55m1 stop Singapore Changi

3:45 pm - 7:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

30h 20m1 stop Singapore Changi

$800Singapore Airlines

Thu, Oct 15 - Thu, Nov 5

9:55 am - 5:50 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 55m1 stop Singapore Changi

1:35 pm - 8:25 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

32h 50m1 stop Singapore Changi

$800Singapore Airlines

Thu, Oct 15 - Wed, Oct 21

11:10 pm - 8:55 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

19h 45m1 stop Manila Ninoy Aquino Intl

1:10 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

20h 35m1 stop Manila Ninoy Aquino Intl

$831Philippine Airlines

Sun, Oct 11 - Wed, Nov 25

1:30 am - 11:10 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

19h 40m1 stop Taipei City Taiwan Taoyuan Intl

12:45 pm - 6:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

20h 25m1 stop Taipei City Taiwan Taoyuan Intl

$847EVA Air

Tue, Oct 13 - Wed, Nov 25

12:30 am - 11:10 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 40m1 stop Taipei City Taiwan Taoyuan Intl

5:15 pm - 6:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

15h 55m1 stop Taipei City Taiwan Taoyuan Intl

$852EVA Air

Tue, Oct 13 - Thu, Nov 26

4:30 pm - 5:55 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

23h 25m1 stop Tokyo Haneda

1:55 pm - 2:25 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

38h 30m1 stop Tokyo Haneda

$866ANA

Mon, Oct 12 - Mon, Oct 19

4:30 pm - 4:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 05m1 stop Tokyo Haneda

7:10 am - 4:12 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 02m2 stops Tokyo Narita Los Angeles

$878United Airlines

Tue, Oct 13 - Thu, Oct 29

4:30 pm - 4:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 05m1 stop Tokyo Haneda

3:45 pm - 7:29 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

41h 44m2 stops Hong Kong Intl Los Angeles

$893United Airlines

Mon, Oct 12 - Thu, Oct 22

4:30 pm - 4:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 05m1 stop Tokyo Haneda

9:35 am - 9:01 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 26m2 stops Tokyo Haneda San Francisco

$901ANA

Mon, Oct 12 - Mon, Oct 19

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Korean Air flights from Seattle to Thailand

Our best Korean Air deals on Seattle to Thailand flight tickets

Korean Air

Mar 1

SEA7:20 amSeattle/Tacoma Intl

24h 45m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Mar 7

BKK1:05 amBangkok Suvarnabhumi

23h 00m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$809

Korean Air

Mar 14

SEA12:10 amSeattle/Tacoma Intl

23h 15m

1 stop

BKK1:25 pmBangkok Suvarnabhumi

Apr 19

BKK11:30 pmBangkok Suvarnabhumi

29h 25m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$822

Korean Air

Jan 28

SEA7:20 amSeattle/Tacoma Intl

24h 45m

2 stops

BKK11:05 pmBangkok Suvarnabhumi

Feb 21

BKK11:15 pmBangkok Suvarnabhumi

24h 50m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$827

Delta flights from Seattle to Thailand

Our best Delta deals on Seattle to Thailand flight tickets

Delta

Jan 28

SEA12:40 pmSeattle/Tacoma Intl

20h 40m

1 stop

BKK12:20 amBangkok Suvarnabhumi

Feb 22

BKK1:05 amBangkok Suvarnabhumi

25h 45m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$818

Delta

Mar 1

SEA12:45 pmSeattle/Tacoma Intl

41h 45m

1 stop

BKK9:30 pmBangkok Suvarnabhumi

Apr 13

BKK9:50 amBangkok Suvarnabhumi

17h 30m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$819

Delta

Nov 9

SEA12:30 pmSeattle/Tacoma Intl

19h 15m

1 stop

CNX10:45 pmChiang Mai

Dec 6

CNX12:20 amChiang Mai

26h 36m

1 stop

SEA11:56 amSeattle/Tacoma Intl

$846

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Tue 2/23

8:40 am-5:10 pm

1 stop41h 30m

Phuket City

Tue 3/2

8:40 am-7:05 am

1 stop37h 25m

$658

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Sun 1/10

8:40 am-5:10 pm

1 stop41h 30m

Phuket City

Tue 1/19

8:25 pm-7:05 am

1 stop25h 40m

$673

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 11/1

9:30 pm-8:55 am

1 stop20h 25m

Bangkok Suvarnabhumi

Sat 11/14

11:40 pm-6:45 pm

1 stop34h 05m

$778

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/24

10:20 am-2:20 pm

1 stop37h 00m

Bangkok Suvarnabhumi

Wed 12/23

11:50 am-8:05 am

1 stop35h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/10

10:20 am-2:20 pm

1 stop37h 00m

Bangkok Suvarnabhumi

Mon 11/23

1:05 am-8:20 am

1 stop22h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 11/25

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Wed 12/2

11:40 pm-6:45 pm

1 stop34h 05m

$796

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 3/1

11:00 am-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Mon 3/8

9:40 pm-9:05 am

1 stop26h 25m

$808

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 3/1

7:20 am-11:05 pm

2 stops24h 45m

Bangkok Suvarnabhumi

Sun 3/7

1:05 am-9:05 am

1 stop23h 00m

$809

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 1/13

12:40 pm-12:20 am

1 stop20h 40m

Bangkok Suvarnabhumi

Tue 1/19

1:05 am-11:51 am

1 stop25h 46m

$818

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 1/21

12:40 pm-12:20 am

1 stop20h 40m

Bangkok Suvarnabhumi

Tue 5/25

9:50 am-1:20 pm

1 stop17h 30m

$818

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Thailand

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Thailand?

The month of March is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $753. If you are unable to visit Thailand during the month of March, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $785.

How far in advance should I book a flight from Seattle to Thailand?

You are more likely to see cheaper flights to Thailand from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $898 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from Seattle for as low as $808 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 27% on your flight if you consider stops on a Seattle to Thailand flight.

Cheap Seattle to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Thailand

Best Price Found	$297
Fastest flight time	19h 55m
Direct flights	None

The best one-way flight to Thailand from Seattle in the past 72 hours is $297. The best round-trip flight deal from Seattle to Thailand found on momondo in the last 72 hours is $658.

The fastest flight from Seattle to Thailand takes 19h 55m

There are no direct flights from Seattle to Thailand. There are no popular flight routes from Seattle to Thailand.

Search flight deals

Frequently asked questions about flying from Seattle to Thailand

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Thailand?
Prices for flights from Seattle/Tacoma Intl Airport to Thailand were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Thailand?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Thailand is 17 as of October 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Thailand?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Thailand.
What documentation or ID do you need to fly to Thailand?
The required travel and health documents for your Thailand trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Thailand. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seattle to Thailand

Compare and see reviews for airlines that fly from Seattle to Thailand with momondo

Airline	Rating	Free Cancellation	Price
Philippine Airlines	PriceFrom $149	Free Cancellation	Rating 7.3 1,031 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.3 71 reviews	Search Hainan Airlines flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,748 reviews	Search Air Canada flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,651 reviews	Search Delta flights
Singapore Airlines	PriceFrom $511	Free Cancellation	Rating 8.2 1,624 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.3 3,724 reviews	Search Qatar Airways flights
Asiana Airlines	PriceFrom $628	Free Cancellation	Rating 8.1 563 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $660	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
ANA	PriceFrom $701	Free Cancellation	Rating 8.3 1,321 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.4 10,331 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Thailand?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Thailand for you.

Can I find flights from Seattle to Thailand with flexible booking policies on momondo?

Yes. All flights to Thailand from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Thailand?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Thailand.

I’m not ready to book a flight from Seattle to Thailand right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Thailand now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Thailand and let you know when they change.