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

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

What airlines fly to Thailand?

Asiana Airlines, EVA Air and Singapore Airlines 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 29% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 16 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 16 as of April 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.

$338 Cheap Flights from Seattle to Thailand in 2026

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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.

10:15 am - 8:00 pm

SEA

BKK

19h 45m

1 stop

8:00 pm - 7:10 am

BKK

SEA

26h 10m

1 stop

$648Singapore Airlines

Tue, Aug 25 - Mon, Nov 2

10:15 am - 8:00 pm

SEA

BKK

19h 45m

1 stop

9:35 am - 8:10 am

BKK

SEA

36h 35m

1 stop

$665Singapore Airlines

Thu, Oct 1 - Sat, Oct 31

10:15 am - 2:15 pm

SEA

BKK

38h 00m

1 stop

12:15 pm - 8:45 am

BKK

SEA

34h 30m

1 stop

$687Singapore Airlines

Tue, Aug 25 - Mon, Sep 14

12:50 pm - 11:35 pm

SEA

BKK

20h 45m

1 stop

9:50 am - 10:40 am

BKK

SEA

38h 50m

1 stop

$741Korean Air

Sun, Apr 26 - Tue, May 12

6:05 pm - 10:10 pm

SEA

HKT

38h 05m

2 stops

11:25 pm - 10:40 am

HKT

SEA

25h 15m

1 stop

$887Korean Air

Sat, May 2 - Mon, May 11

1:00 pm - 10:10 pm

SEA

HKT

19h 10m

1 stop

11:25 pm - 1:11 pm

HKT

SEA

27h 46m

1 stop

$896Delta

Sun, May 3 - Mon, May 11

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:25 am - 6:10 pm

CNX

SEA

21h 45m

1 stop

$897China Airlines

Sun, Sep 27 - Mon, Nov 2

1:30 am - 10:25 am

SEA

CNX

18h 55m

1 stop

11:50 am - 6:30 pm

CNX

SEA

20h 40m

1 stop

$911EVA Air

Tue, Sep 29 - Sat, Oct 31

1:30 am - 10:25 am

SEA

CNX

18h 55m

1 stop

11:50 am - 6:30 pm

CNX

SEA

20h 40m

1 stop

$915EVA Air

Mon, Sep 28 - Thu, Oct 29

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$918China Airlines

Sun, Apr 26 - Tue, May 19

China Airlines flights from Seattle to Thailand

Our best China Airlines deals on Seattle to Thailand flight tickets

China Airlines

Aug 31

SEA1:55 amSeattle/Tacoma Intl

17h 50m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Sep 15

BKK1:20 pmBangkok Suvarnabhumi

20h 25m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$798

China Airlines

Aug 31

SEA1:55 amSeattle/Tacoma Intl

24h 25m

1 stop

BKK4:20 pmBangkok Suvarnabhumi

Sep 15

BKK10:50 amBangkok Suvarnabhumi

22h 55m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$799

China Airlines

Aug 23

SEA1:55 amSeattle/Tacoma Intl

24h 25m

1 stop

BKK4:20 pmBangkok Suvarnabhumi

Oct 11

BKK1:20 pmBangkok Suvarnabhumi

19h 55m

1 stop

SEA7:15 pmSeattle/Tacoma Intl

$826

Singapore Airlines flights from Seattle to Thailand

Our best Singapore Airlines deals on Seattle to Thailand flight tickets

Singapore Airlines

Aug 25

SEA10:15 amSeattle/Tacoma Intl

19h 45m

1 stop

BKK8:00 pmBangkok Suvarnabhumi

Nov 2

BKK8:00 pmBangkok Suvarnabhumi

26h 10m

1 stop

SEA7:10 amSeattle/Tacoma Intl

$648

Singapore Airlines

Aug 25

SEA10:15 amSeattle/Tacoma Intl

38h 00m

1 stop

BKK2:15 pmBangkok Suvarnabhumi

Sep 14

BKK12:15 pmBangkok Suvarnabhumi

34h 30m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$687

Singapore Airlines

Oct 1

SEA10:15 amSeattle/Tacoma Intl

41h 00m

1 stop

BKK5:15 pmBangkok Suvarnabhumi

Oct 31

BKK8:00 pmBangkok Suvarnabhumi

26h 10m

1 stop

SEA8:10 amSeattle/Tacoma Intl

$688

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/25

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Mon 11/2

8:00 pm-7:10 am

1 stop26h 10m

$648

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/1

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Sat 10/31

9:35 am-8:10 am

1 stop36h 35m

$665

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/25

10:15 am-2:15 pm

1 stop38h 00m

Bangkok Suvarnabhumi

Mon 9/14

12:15 pm-8:45 am

1 stop34h 30m

$687

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/26

12:50 pm-11:35 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Tue 5/12

9:50 am-10:40 am

1 stop38h 50m

$741

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 5/2

6:05 pm-10:10 pm

2 stops38h 05m

Phuket City

Mon 5/11

11:25 pm-10:40 am

1 stop25h 15m

$887

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 5/3

1:00 pm-10:10 pm

1 stop19h 10m

Phuket City

Mon 5/11

11:25 pm-1:11 pm

1 stop27h 46m

$896

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/27

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Mon 11/2

11:25 am-6:10 pm

1 stop21h 45m

$897

Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/29

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Sat 10/31

11:50 am-6:30 pm

1 stop20h 40m

$911

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/28

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Thu 10/29

11:50 am-6:30 pm

1 stop20h 40m

$915

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 4/26

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Tue 5/19

11:20 am-7:15 pm

1 stop21h 55m

$918

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 September is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $739. If you are unable to visit Thailand during the month of September, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $742.

How far in advance should I book a flight 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 $866 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 $732 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 56% 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

Fastest flight time	18h 55m
Direct flights	None

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 16 as of April 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 7.3 985 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,203 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,491 reviews	Search Singapore Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,402 reviews	Search Delta flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 10,915 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $627	Free Cancellation	Rating 8.1 515 reviews	Search Asiana Airlines flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.4 1,171 reviews	Search ANA flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,562 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $704	Free Cancellation	Rating 7.6 1,268 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $712	Free Cancellation	Rating 8.3 816 reviews	Search China 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.