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

Korean Air, Singapore Airlines, and Asiana Airlines 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 28% 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 March 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.

$344 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 - 5:10 pm

SEA

HKT

40h 55m

1 stop

3:00 pm - 8:45 am

HKT

SEA

31h 45m

1 stop

$509Singapore Airlines

Fri, Sep 4 - Thu, Sep 17

10:15 am - 7:15 pm

SEA

HKT

19h 00m

1 stop

8:10 pm - 8:45 am

HKT

SEA

26h 35m

1 stop

$531Singapore Airlines

Fri, Sep 18 - Sat, Sep 26

12:50 pm - 1:35 pm

SEA

BKK

34h 45m

1 stop

9:40 pm - 10:40 am

BKK

SEA

27h 00m

1 stop

$637Korean Air

Sun, May 3 - Wed, May 13

12:55 am - 11:20 pm

SEA

BKK

32h 25m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$653Asiana Airlines

Thu, Apr 30 - Sun, May 17

12:55 am - 11:20 pm

SEA

BKK

32h 25m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$663Asiana Airlines

Thu, Apr 30 - Sun, May 3

12:50 pm - 10:10 pm

SEA

HKT

19h 20m

1 stop

11:25 pm - 10:40 am

HKT

SEA

25h 15m

1 stop

$708Korean Air

Sat, May 2 - Mon, May 11

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$772China Airlines

Tue, Sep 15 - Mon, Sep 21

1:55 am - 10:20 am

SEA

CNX

18h 25m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$774China Airlines

Sun, Sep 13 - Mon, Sep 21

2:10 am - 3:10 pm

SEA

USM

23h 00m

2 stops

9:15 am - 7:40 pm

USM

SEA

24h 25m

2 stops

$945EVA Air

Sun, Aug 30 - Mon, Sep 7

2:10 am - 1:45 pm

SEA

USM

21h 35m

2 stops

9:00 pm - 7:40 pm

USM

SEA

36h 40m

2 stops

$991EVA Air

Sun, Aug 30 - Sun, Sep 6

Asiana Airlines flights from Seattle to Thailand

Our best Asiana Airlines deals on Seattle to Thailand flight tickets

Asiana Airlines

Apr 26

SEA12:55 amSeattle/Tacoma Intl

32h 25m

1 stop

BKK11:20 pmBangkok Suvarnabhumi

May 18

BKK1:20 amBangkok Suvarnabhumi

27h 35m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$653

Asiana Airlines

Apr 27

SEA12:55 amSeattle/Tacoma Intl

32h 25m

1 stop

BKK11:20 pmBangkok Suvarnabhumi

May 18

BKK11:45 amBangkok Suvarnabhumi

17h 10m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$658

Asiana Airlines

Apr 30

SEA12:55 amSeattle/Tacoma Intl

32h 25m

1 stop

BKK11:20 pmBangkok Suvarnabhumi

May 14

BKK1:20 amBangkok Suvarnabhumi

27h 35m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$663

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets

Philippine Airlines

Aug 19

SEA11:10 pmSeattle/Tacoma Intl

29h 20m

1 stop

BKK6:30 pmBangkok Suvarnabhumi

Sep 9

BKK7:30 pmBangkok Suvarnabhumi

38h 35m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$660

Philippine Airlines

Sep 8

SEA11:10 pmSeattle/Tacoma Intl

29h 20m

1 stop

BKK6:30 pmBangkok Suvarnabhumi

Sep 15

BKK7:30 pmBangkok Suvarnabhumi

38h 35m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$661

Philippine Airlines

Sep 10

SEA11:10 pmSeattle/Tacoma Intl

23h 00m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Sep 14

BKK7:30 pmBangkok Suvarnabhumi

38h 35m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$695

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 9/4

10:15 am-5:10 pm

1 stop40h 55m

Phuket City

Thu 9/17

3:00 pm-8:45 am

1 stop31h 45m

$509

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 9/18

10:15 am-7:15 pm

1 stop19h 00m

Phuket City

Sat 9/26

8:10 pm-8:45 am

1 stop26h 35m

$531

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/3

12:50 pm-1:35 pm

1 stop34h 45m

Bangkok Suvarnabhumi

Wed 5/13

9:40 pm-10:40 am

1 stop27h 00m

$637

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/30

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Sun 5/17

1:20 am-2:55 pm

1 stop27h 35m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/30

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Sun 5/3

1:20 am-2:55 pm

1 stop27h 35m

$663

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 5/2

12:50 pm-10:10 pm

1 stop19h 20m

Phuket City

Mon 5/11

11:25 pm-10:40 am

1 stop25h 15m

$708

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/15

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Mon 9/21

11:20 am-7:15 pm

1 stop21h 55m

$772

Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/13

1:55 am-10:20 am

1 stop18h 25m

Chiang Mai

Mon 9/21

11:20 am-7:15 pm

1 stop21h 55m

$774

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Sun 8/30

2:10 am-3:10 pm

2 stops23h 00m

Ko Samui

Mon 9/7

9:15 am-7:40 pm

2 stops24h 25m

$945

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Sun 8/30

2:10 am-1:45 pm

2 stops21h 35m

Ko Samui

Sun 9/6

9:00 pm-7:40 pm

2 stops36h 40m

$991

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 February is also very affordable. Most momondo users find prices during this month for around $751.

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 $728 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 57% 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 25m
Direct flights	None

The fastest flight from Seattle to Thailand takes 18h 25m

There are no direct flights from Seattle to Thailand. There are no popular flight routes from Seattle to Thailand.

Search flight deals

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 March 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 $154	Free Cancellation	Rating 7.3 970 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,202 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,484 reviews	Search Singapore Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,317 reviews	Search Delta flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 10,835 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $627	Free Cancellation	Rating 8.1 506 reviews	Search Asiana Airlines flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.4 1,140 reviews	Search ANA flights
United Airlines	PriceFrom $700	Free Cancellation	Rating 7.4 9,462 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $704	Free Cancellation	Rating 7.6 1,224 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $717	Free Cancellation	Rating 8.3 817 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.