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

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

What airlines fly to Thailand?

Asiana Airlines, Singapore Airlines and EVA Air are the top three most popular airlines that fly to Thailand from Seattle according to our data. Asiana Airlines is the first choice among our users, with 28% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 18 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 18 as of September 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.

$313 Cheap Flights from Seattle to Thailand in 2026

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

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

37h 25m1 stop Singapore Changi

$674Singapore Airlines

Wed, Jan 27 - Mon, Feb 8

8:40 am - 7:50 amSEA Seattle/Tacoma Intl-HKT Phuket City

32h 10m1 stop Singapore Changi

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

25h 40m1 stop Singapore Changi

$674Singapore Airlines

Fri, Feb 12 - Mon, Feb 22

7:32 am - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

25h 13m2 stops Los Angeles Incheon Intl

12:20 am - 2:50 pmCNX Chiang Mai-SEA Seattle/Tacoma Intl

29h 30m2 stops Incheon Intl Los Angeles

$780Korean Air

Mon, Oct 26 - Sat, Nov 7

5:45 pm - 10:45 pmSEA Seattle/Tacoma Intl-CNX Chiang Mai

39h 00m2 stops Los Angeles Incheon Intl

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

23h 45m1 stop Incheon Intl

$781Korean Air

Mon, Oct 26 - Sat, Nov 7

12:10 am - 11:15 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

21h 05m1 stop Incheon Intl

11:55 pm - 1:55 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

29h 00m1 stop Incheon Intl

$783Asiana Airlines

Fri, Oct 30 - Sun, Nov 8

12:10 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 30m1 stop Incheon Intl

1:35 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 40m1 stop Incheon Intl

$783Asiana Airlines

Sun, Oct 4 - Sun, Oct 11

10:50 am - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

32h 45m2 stops Vancouver Intl Hong Kong Intl

2:35 am - 2:17 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 42m2 stops Incheon Intl Vancouver Intl

$788Multiple Airlines

Tue, Sep 15 - Mon, Sep 28

3:15 pm - 2:55 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

32h 40m2 stops Vancouver Intl Guangzhou Baiyun

6:05 pm - 1:40 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 35m3 stops Guangzhou Baiyun Vancouver Intl Calgary

$793Multiple Airlines

Tue, Nov 10 - Thu, Nov 19

10:50 am - 5:05 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

28h 15m1 stop Vancouver Intl

7:05 am - 6:32 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 27m1 stop Vancouver Intl

$800Air Canada

Sat, Sep 19 - Mon, Oct 5

3:15 pm - 12:20 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

42h 05m2 stops Vancouver Intl Incheon Intl

9:50 am - 2:37 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

19h 47m2 stops Incheon Intl Vancouver Intl

$803Air Canada

Wed, Dec 2 - Wed, Dec 16

Cheap last minute flights

Enter your travel dates to find the best prices.

7:20 pm - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

24h 15m2 stops Vancouver Intl Hong Kong Intl

2:35 am - 2:17 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 42m2 stops Incheon Intl Vancouver Intl

$788Multiple Airlines

Mon, Sep 7 - Tue, Sep 29

12:10 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 30m1 stop Incheon Intl

1:35 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 40m1 stop Incheon Intl

$796Asiana Airlines

Thu, Sep 10 - Sun, Sep 13

12:10 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 30m1 stop Incheon Intl

1:35 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 40m1 stop Incheon Intl

$796Asiana Airlines

Sun, Sep 6 - Mon, Oct 12

7:20 pm - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

24h 15m2 stops Vancouver Intl Hong Kong Intl

3:45 pm - 6:32 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

40h 47m2 stops Hong Kong Intl Vancouver Intl

$809Multiple Airlines

Mon, Sep 7 - Tue, Oct 13

5:50 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

27h 45m2 stops Vancouver Intl Incheon Intl

8:25 am - 2:37 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

21h 12m1 stop Vancouver Intl

$816Air Canada

Thu, Sep 10 - Sun, Nov 8

5:50 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

27h 45m2 stops Vancouver Intl Incheon Intl

8:25 am - 9:32 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

16h 07m1 stop Vancouver Intl

$821Air Canada

Thu, Sep 10 - Mon, Nov 9

12:50 pm - 1:05 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 15m1 stop Incheon Intl

2:35 am - 10:40 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 05m1 stop Incheon Intl

$822Korean Air

Thu, Sep 10 - Sun, Sep 13

1:55 am - 12:10 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 15m1 stop Taipei City Taiwan Taoyuan Intl

5:30 pm - 7:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

16h 15m1 stop Taipei City Taiwan Taoyuan Intl

$829China Airlines

Mon, Sep 7 - Sun, Sep 13

1:55 am - 12:10 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 15m1 stop Taipei City Taiwan Taoyuan Intl

5:30 pm - 7:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

16h 15m1 stop Taipei City Taiwan Taoyuan Intl

$830China Airlines

Mon, Sep 7 - Sun, Sep 13

7:20 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

26h 15m2 stops San Francisco Incheon Intl

2:35 am - 10:40 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 05m1 stop Incheon Intl

$847Korean Air

Mon, Sep 7 - Wed, Sep 16

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Delta flights from Seattle to Thailand

Our best Delta deals on Seattle to Thailand flight tickets

Delta

Nov 5

SEA12:30 pmSeattle/Tacoma Intl

42h 00m

1 stop

BKK9:30 pmBangkok Suvarnabhumi

Dec 3

BKK12:55 amBangkok Suvarnabhumi

26h 01m

1 stop

SEA11:56 amSeattle/Tacoma Intl

$813

Delta

Sep 13

SEA1:00 pmSeattle/Tacoma Intl

22h 05m

1 stop

BKK1:05 amBangkok Suvarnabhumi

Oct 15

BKK9:40 pmBangkok Suvarnabhumi

29h 34m

1 stop

SEA1:14 pmSeattle/Tacoma Intl

$838

Delta

Oct 13

SEA1:00 pmSeattle/Tacoma Intl

19h 10m

1 stop

HKT10:10 pmPhuket City

Oct 18

HKT11:25 pmPhuket City

27h 49m

1 stop

SEA1:14 pmSeattle/Tacoma Intl

$913

United Airlines flights from Seattle to Thailand

Our best United Airlines deals on Seattle to Thailand flight tickets

United Airlines

Oct 1

SEA4:30 pmSeattle/Tacoma Intl

22h 05m

1 stop

BKK4:35 amBangkok Suvarnabhumi

Oct 15

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$818

United Airlines

Oct 13

SEA7:11 amSeattle/Tacoma Intl

26h 44m

2 stops

BKK11:55 pmBangkok Suvarnabhumi

Dec 15

BKK9:10 amBangkok Suvarnabhumi

19h 10m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$821

United Airlines

Sep 18

SEA6:52 pmSeattle/Tacoma Intl

24h 43m

2 stops

BKK9:35 amBangkok Suvarnabhumi

Oct 7

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$823

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-9:15 am

1 stop33h 35m

Phuket City

Mon 2/8

8:40 am-7:05 am

1 stop37h 25m

$674

SeattlePhuket City

SEA Seattle/Tacoma Intl - HKT Phuket City

SEAHKT

Seattle/Tacoma Intl

Fri 2/12

8:40 am-7:50 am

1 stop32h 10m

Phuket City

Mon 2/22

8:25 pm-7:05 am

1 stop25h 40m

$674

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 10/26

7:32 am-10:45 pm

2 stops25h 13m

Chiang Mai

Sat 11/7

12:20 am-2:50 pm

2 stops29h 30m

$780

SeattleChiang Mai

SEA Seattle/Tacoma Intl - CNX Chiang Mai

SEACNX

Seattle/Tacoma Intl

Mon 10/26

5:45 pm-10:45 pm

2 stops39h 00m

Chiang Mai

Sat 11/7

12:20 am-9:05 am

1 stop23h 45m

$781

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 10/30

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Sun 11/8

11:55 pm-1:55 pm

1 stop29h 00m

$783

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 10/4

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Sun 10/11

1:35 am-3:15 pm

1 stop27h 40m

$783

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 9/15

10:50 am-9:35 am

2 stops32h 45m

Bangkok Suvarnabhumi

Mon 9/28

2:35 am-2:17 pm

2 stops25h 42m

$788

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/10

3:15 pm-2:55 pm

2 stops32h 40m

Bangkok Suvarnabhumi

Thu 11/19

6:05 pm-1:40 pm

3 stops34h 35m

$793

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sat 9/19

10:50 am-5:05 am

1 stop28h 15m

Bangkok Suvarnabhumi

Mon 10/5

7:05 am-6:32 pm

1 stop25h 27m

$800

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 12/2

3:15 pm-12:20 am

2 stops42h 05m

Bangkok Suvarnabhumi

Wed 12/16

9:50 am-2:37 pm

2 stops19h 47m

$803

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 February is also very affordable. Most momondo users find prices during this month for around $773.

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 $896 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 $779 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 26% 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	$313
Fastest flight time	19h 10m
Direct flights	None

The best one-way flight to Thailand from Seattle in the past 72 hours is $313. The best round-trip flight deal from Seattle to Thailand found on momondo in the last 72 hours is $674.

The fastest flight from Seattle to Thailand takes 19h 10m

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 18 as of September 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 1,022 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.4 70 reviews	Search Hainan Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean Air flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,568 reviews	Search Delta flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,593 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.4 3,731 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,581 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $624	Free Cancellation	Rating 8.1 560 reviews	Search Asiana Airlines flights
ANA	PriceFrom $698	Free Cancellation	Rating 8.3 1,309 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.4 10,172 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.