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

Delta, Korean Air, 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 30% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 15 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 15 as of May 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.

$410 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 - 7:15 pm

SEA

HKT

19h 00m

1 stop

8:15 pm - 8:10 am

HKT

SEA

25h 55m

1 stop

$680Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

10:15 am - 2:10 pm

SEA

HKT

37h 55m

1 stop

8:15 pm - 8:10 am

HKT

SEA

25h 55m

1 stop

$681Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

12:10 am - 9:15 pm

SEA

HKT

31h 05m

1 stop

10:55 pm - 2:55 pm

HKT

SEA

30h 00m

1 stop

$950Asiana Airlines

Sun, Oct 4 - Mon, Oct 26

12:10 am - 9:15 pm

SEA

HKT

31h 05m

1 stop

10:25 pm - 3:15 pm

HKT

SEA

30h 50m

1 stop

$951Asiana Airlines

Mon, Aug 24 - Mon, Sep 14

12:00 pm - 10:55 pm

SEA

CNX

20h 55m

1 stop

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$971Korean Air

Tue, Oct 27 - Tue, Nov 10

7:20 am - 10:55 pm

SEA

CNX

25h 35m

2 stops

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$976Korean Air

Tue, Oct 27 - Tue, Nov 10

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:25 am - 7:10 pm

CNX

SEA

21h 45m

1 stop

$1,029China Airlines

Tue, Sep 29 - 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

$1,034China Airlines

Mon, Oct 12 - Thu, Oct 22

1:30 am - 8:45 am

SEA

KBV

41h 15m

2 stops

9:50 am - 7:10 pm

KBV

SEA

23h 20m

2 stops

$1,105EVA Air

Wed, Oct 21 - Wed, Oct 28

2:10 am - 8:45 am

SEA

KBV

40h 35m

2 stops

9:25 am - 7:40 pm

KBV

SEA

24h 15m

2 stops

$1,208EVA Air

Wed, Aug 26 - Thu, Sep 17

Asiana Airlines flights from Seattle to Thailand

Our best Asiana Airlines deals on Seattle to Thailand flight tickets

Asiana Airlines

Sep 1

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Sep 6

BKK1:20 amBangkok Suvarnabhumi

27h 55m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$890

Asiana Airlines

Sep 13

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Nov 30

BKK12:20 pmBangkok Suvarnabhumi

16h 35m

1 stop

SEA1:55 pmSeattle/Tacoma Intl

$892

Asiana Airlines

Aug 25

SEA12:10 amSeattle/Tacoma Intl

20h 30m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Sep 6

BKK1:20 amBangkok Suvarnabhumi

27h 55m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$895

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets

Philippine Airlines

Sep 2

SEA11:10 pmSeattle/Tacoma Intl

19h 45m

1 stop

BKK8:55 amBangkok Suvarnabhumi

Sep 9

BKK10:20 amBangkok Suvarnabhumi

23h 45m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$903

Philippine Airlines

May 12

SEA11:10 pmSeattle/Tacoma Intl

33h 30m

1 stop

BKK10:40 pmBangkok Suvarnabhumi

Jun 10

BKK7:30 pmBangkok Suvarnabhumi

38h 35m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$1,147

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/22

10:15 am-7:15 pm

1 stop19h 00m

Phuket City

Sat 10/31

8:15 pm-8:10 am

1 stop25h 55m

$680

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/22

10:15 am-2:10 pm

1 stop37h 55m

Phuket City

Sat 10/31

8:15 pm-8:10 am

1 stop25h 55m

$681

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 10/4

12:10 am-9:15 pm

1 stop31h 05m

Phuket City

Mon 10/26

10:55 pm-2:55 pm

1 stop30h 00m

$950

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Mon 8/24

12:10 am-9:15 pm

1 stop31h 05m

Phuket City

Mon 9/14

10:25 pm-3:15 pm

1 stop30h 50m

$951

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/27

12:00 pm-10:55 pm

1 stop20h 55m

Chiang Mai

Tue 11/10

12:15 am-9:00 am

1 stop23h 45m

$971

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/27

7:20 am-10:55 pm

2 stops25h 35m

Chiang Mai

Tue 11/10

12:15 am-9:00 am

1 stop23h 45m

$976

Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/29

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Thu 10/29

11:25 am-7:10 pm

1 stop21h 45m

$1,029

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 10/12

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Thu 10/22

11:20 am-7:15 pm

1 stop21h 55m

$1,034

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Wed 10/21

1:30 am-8:45 am

2 stops41h 15m

Krabi

Wed 10/28

9:50 am-7:10 pm

2 stops23h 20m

$1,105

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Wed 8/26

2:10 am-8:45 am

2 stops40h 35m

Krabi

Thu 9/17

9:25 am-7:40 pm

2 stops24h 15m

$1,208

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 $498. If you are unable to visit Thailand during the month of September, then departing from Seattle during the month May is also very affordable. Most momondo users find prices during this month for around $500.

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 $874 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 $733 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 51% 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	19h 00m
Direct flights	None

The fastest flight from Seattle to Thailand takes 19h 00m

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 15 as of May 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 7.3 994 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,216 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,508 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 10,998 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $626	Free Cancellation	Rating 8.1 530 reviews	Search Asiana Airlines flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.3 1,205 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,459 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,313 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $717	Free Cancellation	Rating 8.3 819 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.