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

Singapore Airlines, Korean Air, and United Airlines 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.

$311 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 - 1:55 pmSEA Seattle/Tacoma Intl-HKT Phuket City

38h 15m1 stop Singapore Changi

10:55 am - 7:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

35h 10m1 stop Singapore Changi

$658Singapore Airlines

Wed, Jan 27 - Mon, Feb 1

8:40 am - 7:35 pmSEA Seattle/Tacoma Intl-HKT Phuket City

19h 55m1 stop Singapore Changi

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

25h 40m1 stop Singapore Changi

$663Singapore Airlines

Tue, Mar 9 - Mon, Mar 15

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

37h 00m1 stop Beijing Capital

4:20 pm - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

31h 00m1 stop Beijing Capital

$788Hainan Airlines

Tue, Dec 1 - Fri, Dec 11

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

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

22h 15m1 stop Beijing Capital

$788Hainan Airlines

Thu, Nov 26 - Fri, Dec 18

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

23h 35m1 stop Manila Ninoy Aquino Intl

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

20h 35m1 stop Manila Ninoy Aquino Intl

$792Philippine Airlines

Thu, Nov 26 - Thu, Dec 3

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

23h 35m1 stop Manila Ninoy Aquino Intl

9:55 am - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

23h 50m1 stop Manila Ninoy Aquino Intl

$796Philippine Airlines

Thu, Nov 26 - Thu, Dec 17

8:40 am - 11:00 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

35h 20m1 stop Singapore Changi

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

34h 05m1 stop Manila Ninoy Aquino Intl

$812Multiple Airlines

Sun, Jan 24 - Sun, Jan 31

8:40 am - 8:25 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

32h 45m1 stop Singapore Changi

9:50 am - 2:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

19h 20m1 stop Incheon Intl

$822Multiple Airlines

Sun, Jan 10 - Sun, Jan 24

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

20h 20m1 stop Taipei City Taiwan Taoyuan Intl

2:35 pm - 6:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

18h 35m1 stop Taipei City Taiwan Taoyuan Intl

$844EVA Air

Sun, Oct 25 - Wed, Nov 11

11:30 pm - 10:45 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 15m1 stop Taipei City Taiwan Taoyuan Intl

12:45 pm - 6:40 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

19h 55m1 stop Taipei City Taiwan Taoyuan Intl

$844EVA Air

Thu, Mar 11 - Tue, Mar 23

Cheap last minute flights

Enter your travel dates to find the best prices.

9:55 am - 8:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 05m1 stop Singapore Changi

12:00 pm - 7:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Singapore Changi

$792Singapore Airlines

Tue, Oct 20 - Tue, Nov 17

9:55 am - 5:15 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 20m1 stop Singapore Changi

9:40 am - 7:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 25m1 stop Singapore Changi

$819Singapore Airlines

Sat, Oct 17 - Tue, Nov 3

1:30 am - 10:25 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

18h 55m1 stop Taipei City Taiwan Taoyuan Intl

8:25 am - 6:30 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

24h 05m1 stop Taipei City Taiwan Taoyuan Intl

$844EVA Air

Sun, Oct 18 - Thu, Oct 29

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

19h 40m1 stop Taipei City Taiwan Taoyuan Intl

8:25 am - 7:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

24h 45m1 stop Taipei City Taiwan Taoyuan Intl

$846EVA Air

Sun, Oct 18 - Wed, Oct 28

11:10 pm - 10:40 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 30m1 stop Manila Ninoy Aquino Intl

1:25 pm - 8:05 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

20h 40m1 stop Manila Ninoy Aquino Intl

$868Philippine Airlines

Thu, Oct 15 - Tue, Oct 20

11:45 am - 12:10 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 25m1 stop Hong Kong Intl

12:45 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 00m1 stop Hong Kong Intl

$888Cathay Pacific

Tue, Oct 20 - Sun, Nov 15

11:45 am - 12:10 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 25m1 stop Hong Kong Intl

7:30 am - 9:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

16h 15m1 stop Hong Kong Intl

$896Cathay Pacific

Tue, Oct 20 - Thu, Oct 29

12:16 pm - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

31h 19m2 stops Los Angeles Hong Kong Intl

9:10 am - 2:20 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

19h 10m1 stop Tokyo Haneda

$917United Airlines

Tue, Oct 20 - Wed, Oct 28

4:35 pm - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

27h 00m2 stops Los Angeles Hong Kong Intl

9:10 am - 2:20 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

19h 10m1 stop Tokyo Haneda

$917United Airlines

Tue, Oct 20 - Thu, Oct 29

11:10 pm - 12:10 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

23h 00m1 stop Manila Ninoy Aquino Intl

7:30 pm - 7:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

38h 15m1 stop Manila Ninoy Aquino Intl

$1,075Philippine Airlines

Thu, Oct 15 - Sat, Oct 24

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

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets

Hainan Airlines

Nov 10

SEA10:20 amSeattle/Tacoma Intl

22h 05m

1 stop

BKK11:25 pmBangkok Suvarnabhumi

Nov 23

BKK1:05 amBangkok Suvarnabhumi

22h 15m

1 stop

SEA8:20 amSeattle/Tacoma Intl

$788

Hainan Airlines

Oct 29

SEA11:05 amSeattle/Tacoma Intl

33h 35m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Nov 13

BKK4:20 pmBangkok Suvarnabhumi

31h 00m

1 stop

SEA8:20 amSeattle/Tacoma Intl

$789

Hainan Airlines

Nov 26

SEA10:05 amSeattle/Tacoma Intl

33h 35m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Dec 16

BKK11:10 amBangkok Suvarnabhumi

35h 55m

2 stops

SEA8:05 amSeattle/Tacoma Intl

$799

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets

Philippine Airlines

Nov 26

SEA9:30 pmSeattle/Tacoma Intl

23h 35m

1 stop

BKK12:05 pmBangkok Suvarnabhumi

Dec 3

BKK1:10 pmBangkok Suvarnabhumi

20h 35m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$792

Philippine Airlines

Nov 4

SEA9:30 pmSeattle/Tacoma Intl

20h 25m

1 stop

BKK8:55 amBangkok Suvarnabhumi

Nov 14

BKK7:50 pmBangkok Suvarnabhumi

37h 55m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$796

Philippine Airlines

Nov 4

SEA9:30 pmSeattle/Tacoma Intl

23h 35m

1 stop

BKK12:05 pmBangkok Suvarnabhumi

Nov 25

BKK9:55 amBangkok Suvarnabhumi

23h 50m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$797

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Wed 1/27

8:40 am-1:55 pm

1 stop38h 15m

Phuket City

Mon 2/1

10:55 am-7:05 am

1 stop35h 10m

$658

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Tue 3/9

8:40 am-7:35 pm

1 stop19h 55m

Phuket City

Mon 3/15

8:25 pm-8:05 am

1 stop25h 40m

$663

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 12/1

10:20 am-2:20 pm

1 stop37h 00m

Bangkok Suvarnabhumi

Fri 12/11

4:20 pm-8:20 am

1 stop31h 00m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/26

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Fri 12/18

1:05 am-8:20 am

1 stop22h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/26

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Thu 12/3

1:10 pm-6:45 pm

1 stop20h 35m

$792

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/26

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Thu 12/17

9:55 am-6:45 pm

1 stop23h 50m

$796

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 1/24

8:40 am-11:00 am

1 stop35h 20m

Bangkok Suvarnabhumi

Sun 1/31

11:40 pm-6:45 pm

1 stop34h 05m

$812

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 1/10

8:40 am-8:25 am

1 stop32h 45m

Bangkok Suvarnabhumi

Sun 1/24

9:50 am-2:10 pm

1 stop19h 20m

$822

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 10/25

1:10 am-11:30 am

1 stop20h 20m

Bangkok Suvarnabhumi

Wed 11/11

2:35 pm-6:10 pm

1 stop18h 35m

$844

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 3/11

11:30 pm-10:45 am

1 stop20h 15m

Bangkok Suvarnabhumi

Tue 3/23

12:45 pm-6:40 pm

1 stop19h 55m

$844

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 $755. If you are unable to visit Thailand during the month of March, then departing from Seattle during the month April is also very affordable. Most momondo users find prices during this month for around $786.

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 $902 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 $825 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 30% 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	$311
Fastest flight time	18h 55m
Direct flights	None

The best one-way flight to Thailand from Seattle in the past 72 hours is $311. 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 18h 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 11,769 reviews	Search Air Canada flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,650 reviews	Search Delta flights
Singapore Airlines	PriceFrom $511	Free Cancellation	Rating 8.2 1,623 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.3 3,721 reviews	Search Qatar Airways flights
Asiana Airlines	PriceFrom $626	Free Cancellation	Rating 8.1 563 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $655	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
ANA	PriceFrom $702	Free Cancellation	Rating 8.3 1,325 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.4 10,360 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.