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

Asiana Airlines, Delta, and United Airlines 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 August 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.

$398 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.

8:45 am - 5:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 15m1 stop Singapore Changi

9:40 am - 7:10 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 30m1 stop Singapore Changi

$676Singapore Airlines

Tue, Nov 3 - Thu, Nov 12

10:15 am - 5:15 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 00m1 stop Singapore Changi

9:20 am - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

37h 25m1 stop Singapore Changi

$681Singapore Airlines

Fri, Sep 25 - Thu, Oct 15

3:00 pm - 12:50 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

31h 50m2 stops Vancouver Intl Guangzhou Baiyun

6:05 pm - 9:40 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

29h 35m3 stops Guangzhou Baiyun Vancouver Intl Calgary

$732Multiple Airlines

Fri, Sep 4 - Fri, Sep 18

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

20h 30m1 stop Incheon Intl

11:45 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

17h 30m1 stop Incheon Intl

$750Asiana Airlines

Mon, Sep 28 - Tue, Oct 6

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

$753Air Canada

Mon, Sep 14 - Wed, Sep 23

3:00 pm - 5:05 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

24h 05m1 stop Vancouver Intl

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

25h 27m1 stop Vancouver Intl

$753Air Canada

Mon, Sep 14 - Mon, Oct 19

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

20h 30m1 stop Incheon Intl

11:45 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

17h 30m1 stop Incheon Intl

$762Asiana Airlines

Sun, Sep 6 - Mon, Sep 21

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

32h 45m2 stops Vancouver Intl Hong Kong Intl

7:05 am - 2:17 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

21h 12m1 stop Vancouver Intl

$780Multiple Airlines

Sun, Sep 13 - Mon, Sep 28

12:50 pm - 9:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

18h 55m1 stop Incheon Intl

11:30 pm - 10:40 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

25h 10m1 stop Incheon Intl

$801Korean Air

Fri, Sep 11 - Wed, Sep 30

7:15 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

26h 20m2 stops San Francisco Incheon Intl

11:30 pm - 10:05 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 35m2 stops Incheon Intl Las Vegas Harry Reid Intl

$802Korean Air

Tue, Sep 29 - Tue, Oct 6

Cheap last minute flights

Enter your travel dates to find the best prices.

10:40 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 55m2 stops Vancouver Intl Incheon Intl

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

25h 27m1 stop Vancouver Intl

$815Air Canada

Sun, Aug 23 - Mon, Sep 21

10:15 am - 7:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

42h 45m1 stop Singapore Changi

8:15 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

26h 30m1 stop Singapore Changi

$818Singapore Airlines

Sun, Aug 23 - Mon, Sep 21

12:10 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 25m1 stop Incheon Intl

11:45 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

17h 30m1 stop Incheon Intl

$841Asiana Airlines

Thu, Aug 20 - Mon, Sep 7

12:10 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 25m1 stop Incheon Intl

11:45 am - 3:15 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

17h 30m1 stop Incheon Intl

$841Asiana Airlines

Thu, Aug 20 - Tue, Sep 8

1:55 am - 9:45 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

17h 50m1 stop Taipei City Taiwan Taoyuan Intl

2:40 am - 7:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

31h 05m1 stop Taipei City Taiwan Taoyuan Intl

$842China Airlines

Sat, Aug 22 - Sat, Sep 5

10:40 am - 11:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 55m2 stops Vancouver Intl Incheon Intl

3:45 pm - 2:17 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 32m2 stops Hong Kong Intl Vancouver Intl

$844Multiple Airlines

Sun, Aug 23 - Mon, Sep 21

1:15 am - 12:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 45m1 stop Taipei City Taiwan Taoyuan Intl

5:50 pm - 4:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

36h 20m1 stop Taipei City Taiwan Taoyuan Intl

$848STARLUX Airlines

Sat, Aug 22 - Sun, Sep 6

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

$878China Airlines

Sat, Aug 22 - Mon, Sep 7

12:15 pm - 9:35 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

31h 20m2 stops Los Angeles Hong Kong Intl

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

38h 30m1 stop Tokyo Haneda

$890Multiple Airlines

Thu, Aug 20 - Sat, Aug 29

7:20 pm - 5:05 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

19h 45m1 stop Vancouver Intl

7:05 am - 10:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

41h 00m1 stop Vancouver Intl

$1,492Air Canada

Sat, Aug 22 - Fri, Aug 28

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Asiana Airlines flights from Seattle to Thailand

Our best Asiana Airlines deals on Seattle to Thailand flight tickets

Asiana Airlines

Sep 28

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Oct 6

BKK11:45 amBangkok Suvarnabhumi

17h 30m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$750

Asiana Airlines

Sep 6

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Sep 21

BKK11:45 amBangkok Suvarnabhumi

17h 30m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$762

Asiana Airlines

Oct 19

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Nov 7

BKK11:55 pmBangkok Suvarnabhumi

29h 00m

1 stop

SEA1:55 pmSeattle/Tacoma Intl

$769

Air Canada flights from Seattle to Thailand

Our best Air Canada deals on Seattle to Thailand flight tickets

Air Canada

Sep 7

SEA10:40 amSeattle/Tacoma Intl

28h 25m

1 stop

BKK5:05 amBangkok Suvarnabhumi

Sep 30

BKK7:05 amBangkok Suvarnabhumi

25h 27m

1 stop

SEA6:32 pmSeattle/Tacoma Intl

$753

Air Canada

Aug 24

SEA3:00 pmSeattle/Tacoma Intl

24h 05m

1 stop

BKK5:05 amBangkok Suvarnabhumi

Sep 23

BKK7:05 amBangkok Suvarnabhumi

17h 00m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$757

Air Canada

Aug 24

SEA3:00 pmSeattle/Tacoma Intl

24h 05m

1 stop

BKK5:05 amBangkok Suvarnabhumi

Sep 23

BKK7:05 amBangkok Suvarnabhumi

17h 00m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$758

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/3

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Thu 11/12

9:40 am-7:10 am

1 stop36h 30m

$676

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/25

10:15 am-5:15 pm

1 stop41h 00m

Bangkok Suvarnabhumi

Thu 10/15

9:20 am-8:45 am

1 stop37h 25m

$681

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/4

3:00 pm-12:50 pm

2 stops31h 50m

Bangkok Suvarnabhumi

Fri 9/18

6:05 pm-9:40 am

3 stops29h 35m

$732

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/28

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Tue 10/6

11:45 am-3:15 pm

1 stop17h 30m

$750

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/14

10:50 am-5:05 am

1 stop28h 15m

Bangkok Suvarnabhumi

Wed 9/23

7:05 am-6:32 pm

1 stop25h 27m

$753

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/14

3:00 pm-5:05 am

1 stop24h 05m

Bangkok Suvarnabhumi

Mon 10/19

7:05 am-6:32 pm

1 stop25h 27m

$753

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 9/6

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Mon 9/21

11:45 am-3:15 pm

1 stop17h 30m

$762

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 9/13

10:50 am-9:35 am

2 stops32h 45m

Bangkok Suvarnabhumi

Mon 9/28

7:05 am-2:17 pm

1 stop21h 12m

$780

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/11

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Wed 9/30

11:30 pm-10:40 am

1 stop25h 10m

$801

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 9/29

7:15 am-11:35 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Tue 10/6

11:30 pm-10:05 pm

2 stops36h 35m

$802

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 $771.

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 $895 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 $740 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 6% 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	$398
Fastest flight time	18h 45m
Direct flights	None

The best one-way flight to Thailand from Seattle in the past 72 hours is $398. The best round-trip flight deal from Seattle to Thailand found on momondo in the last 72 hours is $676.

The fastest flight from Seattle to Thailand takes 18h 45m

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 August 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 1,019 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.3 68 reviews	Search Hainan Airlines flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,498 reviews	Search Delta flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,584 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.4 3,739 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,498 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $624	Free Cancellation	Rating 8.1 559 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $652	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean Air flights
ANA	PriceFrom $699	Free Cancellation	Rating 8.3 1,298 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.4 10,102 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.