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

Singapore Airlines, Hainan Airlines, and Asiana Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Thailand

What airlines fly to Thailand?

EVA Air, Asiana Airlines and China Airlines are the top three most popular airlines that fly to Thailand from Seattle according to our data. EVA Air is the first choice among our users, with 32% 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 January 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.

$307 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.

9:45 am - 7:25 pm

SEA

HKT

19h 40m1 stop

8:40 am - 8:10 am

HKT

SEA

37h 30m1 stop

$592Singapore Airlines

Sun, Mar 8 - Mon, Mar 23

8:45 am - 9:15 am

SEA

HKT

33h 30m1 stop

8:40 am - 7:10 am

HKT

SEA

37h 30m1 stop

$619Singapore Airlines

Sun, Feb 1 - Thu, Feb 12

7:24 am - 1:15 pm

SEA

BKK

39h 51m2 stops

9:40 pm - 10:40 am

BKK

SEA

27h 00m1 stop

$650Korean Air

Fri, Apr 10 - Sun, Apr 19

12:50 pm - 9:45 pm

SEA

BKK

18h 55m1 stop

9:40 pm - 10:40 am

BKK

SEA

27h 00m1 stop

$653Korean Air

Wed, Apr 8 - Thu, Apr 23

12:10 am - 10:00 pm

SEA

BKK

30h 50m1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m1 stop

$655Asiana Airlines

Sat, Feb 28 - Mon, Mar 30

12:10 am - 10:00 pm

SEA

BKK

31h 50m1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m1 stop

$656Asiana Airlines

Sun, Mar 15 - Mon, Mar 30

12:10 am - 10:25 am

SEA

CNX

19h 15m1 stop

11:25 am - 7:10 pm

CNX

SEA

21h 45m1 stop

$783China Airlines

Sun, Mar 1 - Tue, Mar 17

12:10 am - 10:25 am

SEA

CNX

19h 15m1 stop

11:25 am - 7:10 pm

CNX

SEA

21h 45m1 stop

$799China Airlines

Mon, Mar 2 - Tue, Mar 17

11:30 pm - 10:35 am

SEA

CNX

20h 05m1 stop

11:50 am - 7:10 pm

CNX

SEA

21h 20m1 stop

$814EVA Air

Sat, Feb 28 - Thu, Mar 19

12:10 am - 10:35 am

SEA

CNX

19h 25m1 stop

11:50 am - 7:10 pm

CNX

SEA

21h 20m1 stop

$819EVA Air

Sat, Feb 28 - Thu, Mar 19

Korean Air flights from Seattle to Thailand

Our best Korean Air deals on Seattle to Thailand flight tickets

Korean Air

Feb 1

SEA11:00 amSeattle/Tacoma Intl

19h 30m

1 stop

BKK9:30 pmBangkok Suvarnabhumi

Feb 11

BKK2:05 amBangkok Suvarnabhumi

21h 55m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$654

Find similar

Korean Air

Feb 2

SEA7:15 amSeattle/Tacoma Intl

26h 30m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 16

BKK2:05 amBangkok Suvarnabhumi

21h 55m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$660

Find similar

Korean Air

Jan 8

SEA11:00 amSeattle/Tacoma Intl

35h 25m

1 stop

BKK1:25 pmBangkok Suvarnabhumi

Jan 21

BKK11:15 pmBangkok Suvarnabhumi

24h 45m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$662

Find similar

Singapore Airlines flights from Seattle to Thailand

Our best Singapore Airlines deals on Seattle to Thailand flight tickets

Singapore Airlines

Mar 8

SEA9:45 amSeattle/Tacoma Intl

19h 40m

1 stop

HKT7:25 pmPhuket City

Mar 23

HKT8:40 amPhuket City

37h 30m

1 stop

SEA8:10 amSeattle/Tacoma Intl

$592

Find similar

Singapore Airlines

Feb 1

SEA8:45 amSeattle/Tacoma Intl

33h 30m

1 stop

HKT9:15 amPhuket City

Feb 12

HKT8:40 amPhuket City

37h 30m

1 stop

SEA7:10 amSeattle/Tacoma Intl

$619

Find similar

Singapore Airlines

Mar 3

SEA8:45 amSeattle/Tacoma Intl

19h 40m

1 stop

HKT7:25 pmPhuket City

Mar 11

HKT3:25 pmPhuket City

30h 45m

1 stop

SEA8:10 amSeattle/Tacoma Intl

$653

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 3/8

9:45 am-7:25 pm

1 stop19h 40m

Phuket City

Mon 3/23

8:40 am-8:10 am

1 stop37h 30m

$592

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 2/1

8:45 am-9:15 am

1 stop33h 30m

Phuket City

Thu 2/12

8:40 am-7:10 am

1 stop37h 30m

$619

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 4/10

7:24 am-1:15 pm

2 stops39h 51m

Bangkok Suvarnabhumi

Sun 4/19

9:40 pm-10:40 am

1 stop27h 00m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 4/8

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Thu 4/23

9:40 pm-10:40 am

1 stop27h 00m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/28

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Mon 3/30

1:20 am-2:55 pm

1 stop27h 35m

$655

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/15

12:10 am-10:00 pm

1 stop31h 50m

Bangkok Suvarnabhumi

Mon 3/30

1:20 am-2:55 pm

1 stop27h 35m

$656

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/1

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 3/17

11:25 am-7:10 pm

1 stop21h 45m

$783

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/2

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 3/17

11:25 am-7:10 pm

1 stop21h 45m

$799

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 2/28

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Thu 3/19

11:50 am-7:10 pm

1 stop21h 20m

$814

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 2/28

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Thu 3/19

11:50 am-7:10 pm

1 stop21h 20m

$819

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 $749. 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 $760.

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 $891 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 $750 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 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 January 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 $173	Free Cancellation	Rating 7.3 946 reviews	Search Philippine Airlines flights
Delta	PriceFrom $433	Free Cancellation	Rating 7.9 8,020 reviews	Search Delta flights
Singapore Airlines	PriceFrom $519	Free Cancellation	Rating 8.1 1,424 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $612	Free Cancellation	Rating 8.2 501 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $685	Free Cancellation	Rating 8.4 1,185 reviews	Search Korean Air flights
ANA	PriceFrom $686	Free Cancellation	Rating 8.4 1,052 reviews	Search ANA flights
United Airlines	PriceFrom $700	Free Cancellation	Rating 7.4 9,132 reviews	Search United Airlines flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 798 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,114 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 252 reviews	Search STARLUX 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.