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

United Airlines, Korean Air, and EVA 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.

$304 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 - 9:15 amSEA Seattle/Tacoma Intl-HKT Phuket City

33h 35m1 stop Singapore Changi

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

25h 40m1 stop Singapore Changi

$657Singapore Airlines

Sun, Jan 10 - Mon, Jan 25

9:40 am - 7:35 pmSEA Seattle/Tacoma Intl-HKT Phuket City

19h 55m1 stop Singapore Changi

2:45 pm - 8:05 amHKT Phuket City-SEA Seattle/Tacoma Intl

31h 20m1 stop Singapore Changi

$658Singapore Airlines

Wed, Mar 17 - Tue, Mar 23

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

20h 20m1 stop Singapore Changi

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

34h 05m1 stop Manila Ninoy Aquino Intl

$777Multiple Airlines

Tue, Jan 26 - Wed, Jan 27

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

$787Multiple Airlines

Sun, Jan 10 - Sat, Jan 23

10:20 am - 11:25 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 05m1 stop Beijing Capital

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

22h 15m1 stop Beijing Capital

$788Hainan Airlines

Tue, Dec 1 - Mon, Dec 7

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

33h 35m1 stop Chongqing Jiangbei Intl

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

35h 15m1 stop Chongqing Jiangbei Intl

$788Hainan Airlines

Thu, Nov 19 - Wed, Dec 9

9:30 pm - 10:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

34h 15m1 stop Manila Ninoy Aquino Intl

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

20h 35m1 stop Manila Ninoy Aquino Intl

$796Philippine Airlines

Wed, Nov 18 - Sun, Dec 6

9:30 pm - 10:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

34h 15m1 stop Manila Ninoy Aquino Intl

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

20h 35m1 stop Manila Ninoy Aquino Intl

$796Philippine Airlines

Mon, Nov 2 - Mon, Nov 23

11:00 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

20h 45m1 stop Incheon Intl

12:20 am - 9:05 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

23h 45m1 stop Incheon Intl

$841Korean Air

Mon, Jan 18 - Sun, Jan 31

11:00 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

20h 45m1 stop Incheon Intl

12:20 am - 9:05 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

23h 45m1 stop Incheon Intl

$872Korean Air

Wed, Jan 27 - Wed, Feb 10

Cheap last minute flights

Enter your travel dates to find the best prices.

9:55 am - 7:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

43h 05m1 stop Singapore Changi

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

36h 25m1 stop Singapore Changi

$785Singapore Airlines

Thu, Oct 22 - Thu, Nov 5

9:55 am - 7:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

43h 05m1 stop Singapore Changi

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

36h 25m1 stop Singapore Changi

$787Singapore Airlines

Thu, Oct 22 - Thu, Nov 5

11:00 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 20m1 stop Beijing Capital

1:05 am - 9:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 15m1 stop Beijing Capital

$788Hainan Airlines

Sat, Oct 24 - Fri, Oct 30

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

23h 00m1 stop Manila Ninoy Aquino Intl

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

20h 35m1 stop Manila Ninoy Aquino Intl

$853Philippine Airlines

Thu, Oct 22 - Mon, Nov 16

11:45 am - 9:45 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

32h 00m1 stop Hong Kong Intl

7:40 pm - 8:45 amCNX Chiang Mai-SEA Seattle/Tacoma Intl

28h 05m1 stop Hong Kong Intl

$873Cathay Pacific

Tue, Oct 20 - Tue, Nov 10

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

22h 25m1 stop Hong Kong Intl

5:00 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

30h 45m1 stop Hong Kong Intl

$879Cathay Pacific

Tue, Oct 20 - Sun, Nov 8

1:30 am - 10:35 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:50 am - 6:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m1 stop Taipei City Taiwan Taoyuan Intl

$918EVA Air

Sat, Oct 24 - Thu, Nov 12

12:30 am - 10:25 amSEA Seattle/Tacoma Intl-CNX Chiang Mai

19h 55m1 stop Taipei City Taiwan Taoyuan Intl

11:50 am - 7:10 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

21h 20m1 stop Taipei City Taiwan Taoyuan Intl

$956EVA Air

Thu, Oct 22 - Sun, Nov 1

11:55 am - 6:15 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

40h 20m2 stops Chongqing Jiangbei Intl Haikou Meilan Intl

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

31h 00m1 stop Beijing Capital

$961Hainan Airlines

Thu, Oct 22 - Mon, Nov 16

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

23h 00m1 stop Manila Ninoy Aquino Intl

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

34h 05m1 stop Manila Ninoy Aquino Intl

$3,972Philippine Airlines

Wed, Oct 21 - Sun, Nov 1

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Korean Air flights from Seattle to Thailand

Our best Korean Air deals on Seattle to Thailand flight tickets

Korean Air

Jan 18

SEA11:00 amSeattle/Tacoma Intl

20h 45m

1 stop

CNX10:45 pmChiang Mai

Jan 31

CNX12:20 amChiang Mai

23h 45m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$841

Korean Air

Jan 13

SEA12:10 amSeattle/Tacoma Intl

33h 10m

1 stop

BKK12:20 amBangkok Suvarnabhumi

Jan 20

BKK9:40 pmBangkok Suvarnabhumi

26h 25m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$854

Korean Air

Feb 10

SEA11:00 amSeattle/Tacoma Intl

20h 45m

1 stop

CNX10:45 pmChiang Mai

Feb 24

CNX12:20 amChiang Mai

28h 50m

1 stop

SEA2:10 pmSeattle/Tacoma Intl

$872

Cathay Pacific flights from Seattle to Thailand

Our best Cathay Pacific deals on Seattle to Thailand flight tickets

Cathay Pacific

Feb 9

SEA10:25 amSeattle/Tacoma Intl

33h 55m

1 stop

HKT11:20 amPhuket City

Feb 24

HKT6:50 pmPhuket City

28h 55m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$858

Cathay Pacific

Mar 15

SEA11:25 amSeattle/Tacoma Intl

33h 55m

1 stop

HKT11:20 amPhuket City

Mar 24

HKT6:50 pmPhuket City

28h 55m

1 stop

SEA9:45 amSeattle/Tacoma Intl

$871

Cathay Pacific

Mar 15

SEA11:25 amSeattle/Tacoma Intl

33h 55m

1 stop

HKT11:20 amPhuket City

Mar 24

HKT6:50 pmPhuket City

28h 55m

1 stop

SEA9:45 amSeattle/Tacoma Intl

$872

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Sun 1/10

8:40 am-9:15 am

1 stop33h 35m

Phuket City

Mon 1/25

8:25 pm-7:05 am

1 stop25h 40m

$657

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Wed 3/17

9:40 am-7:35 pm

1 stop19h 55m

Phuket City

Tue 3/23

2:45 pm-8:05 am

1 stop31h 20m

$658

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 1/26

8:40 am-8:00 pm

1 stop20h 20m

Bangkok Suvarnabhumi

Wed 1/27

11:40 pm-6:45 pm

1 stop34h 05m

$777

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 1/10

8:40 am-11:00 am

1 stop35h 20m

Bangkok Suvarnabhumi

Sat 1/23

11:40 pm-6:45 pm

1 stop34h 05m

$787

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 12/1

10:20 am-11:25 pm

1 stop22h 05m

Bangkok Suvarnabhumi

Mon 12/7

1:05 am-8:20 am

1 stop22h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/19

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 12/9

11:50 am-8:05 am

1 stop35h 15m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 11/18

9:30 pm-10:45 pm

1 stop34h 15m

Bangkok Suvarnabhumi

Sun 12/6

1:10 pm-6:45 pm

1 stop20h 35m

$796

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 11/2

9:30 pm-10:45 pm

1 stop34h 15m

Bangkok Suvarnabhumi

Mon 11/23

1:10 pm-6:45 pm

1 stop20h 35m

$796

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 1/18

11:00 am-10:45 pm

1 stop20h 45m

Chiang Mai

Sun 1/31

12:20 am-9:05 am

1 stop23h 45m

$841

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Wed 1/27

11:00 am-10:45 pm

1 stop20h 45m

Chiang Mai

Wed 2/10

12:20 am-9:05 am

1 stop23h 45m

$872

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 $758. 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 $789.

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 $903 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 $827 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	$304
Fastest flight time	19h 55m
Direct flights	None

The best one-way flight to Thailand from Seattle in the past 72 hours is $304. The best round-trip flight deal from Seattle to Thailand found on momondo in the last 72 hours is $657.

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 1,036 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 11,782 reviews	Search Air Canada flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,652 reviews	Search Delta flights
Singapore Airlines	PriceFrom $511	Free Cancellation	Rating 8.2 1,628 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.3 3,712 reviews	Search Qatar Airways flights
Asiana Airlines	PriceFrom $630	Free Cancellation	Rating 8.1 567 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 1,326 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.3 10,389 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.