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

China Airlines, Delta, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Thailand

What airlines fly to Thailand?

EVA Air, Asiana Airlines and Singapore 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 30% 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 February 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.

$271 Cheap Flights from Seattle to Thailand in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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 - 8:35 am

SEA

HKT

32h 20m

1 stop

9:25 am - 8:45 am

HKT

SEA

37h 20m

1 stop

$504Singapore Airlines

Sat, Apr 18 - Thu, Apr 23

10:15 am - 8:35 am

SEA

HKT

32h 20m

1 stop

8:10 pm - 8:45 am

HKT

SEA

26h 35m

1 stop

$521Singapore Airlines

Sat, Apr 18 - Thu, Apr 23

10:15 am - 8:35 am

SEA

HKT

32h 20m

1 stop

8:10 pm - 8:45 am

HKT

SEA

26h 35m

1 stop

$522Singapore Airlines

Sat, Apr 18 - Thu, Apr 23

12:55 am - 10:40 am

SEA

BKK

19h 45m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$643Asiana Airlines

Sun, Apr 26 - Sun, May 10

12:10 am - 10:00 pm

SEA

BKK

30h 50m

1 stop

12:20 pm - 2:55 pm

BKK

SEA

16h 35m

1 stop

$648Asiana Airlines

Sat, Mar 7 - Wed, Mar 18

11:10 pm - 12:10 pm

SEA

BKK

23h 00m

1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m

1 stop

$659Philippine Airlines

Sun, Aug 16 - Tue, Sep 22

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$814China Airlines

Sun, Apr 12 - Mon, Apr 20

1:55 am - 10:20 am

SEA

CNX

18h 25m

1 stop

11:20 am - 7:45 pm

CNX

SEA

22h 25m

1 stop

$870China Airlines

Thu, Aug 13 - Mon, Aug 31

12:10 am - 9:05 am

SEA

KBV

41h 55m

2 stops

9:50 am - 7:10 pm

KBV

SEA

23h 20m

2 stops

$976EVA Air

Sat, Mar 7 - Wed, Mar 11

11:50 pm - 8:25 pm

SEA

USM

30h 35m

2 stops

8:10 am - 7:30 pm

USM

SEA

25h 20m

2 stops

$1,065EVA Air

Tue, Mar 24 - Thu, Apr 16

China Airlines flights from Seattle to Thailand

Our best China Airlines deals on Seattle to Thailand flight tickets

China Airlines

Apr 12

SEA1:15 amSeattle/Tacoma Intl

18h 30m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Apr 20

BKK1:20 pmBangkok Suvarnabhumi

19h 55m

1 stop

SEA7:15 pmSeattle/Tacoma Intl

$705

China Airlines

Apr 12

SEA1:15 amSeattle/Tacoma Intl

18h 30m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Apr 20

BKK5:30 pmBangkok Suvarnabhumi

15h 45m

1 stop

SEA7:15 pmSeattle/Tacoma Intl

$706

China Airlines

Mar 3

SEA12:10 amSeattle/Tacoma Intl

21h 55m

1 stop

BKK1:05 pmBangkok Suvarnabhumi

Mar 15

BKK10:55 amBangkok Suvarnabhumi

22h 15m

1 stop

SEA7:10 pmSeattle/Tacoma Intl

$775

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets

Hainan Airlines

Apr 7

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Apr 20

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$682

Hainan Airlines

Apr 7

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Apr 20

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$687

Hainan Airlines

Apr 11

SEA11:00 amSeattle/Tacoma Intl

35h 20m

1 stop

BKK12:20 pmBangkok Suvarnabhumi

May 8

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$711

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 4/18

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Thu 4/23

9:25 am-8:45 am

1 stop37h 20m

$504

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 4/18

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Thu 4/23

8:10 pm-8:45 am

1 stop26h 35m

$521

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sat 4/18

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Thu 4/23

8:10 pm-8:45 am

1 stop26h 35m

$522

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/26

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

Sun 5/10

1:20 am-2:55 pm

1 stop27h 35m

$643

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 3/7

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Wed 3/18

12:20 pm-2:55 pm

1 stop16h 35m

$648

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/16

11:10 pm-12:10 pm

1 stop23h 00m

Bangkok Suvarnabhumi

Tue 9/22

1:25 pm-8:05 pm

1 stop20h 40m

$659

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 4/12

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Mon 4/20

11:20 am-7:15 pm

1 stop21h 55m

$814

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 8/13

1:55 am-10:20 am

1 stop18h 25m

Chiang Mai

Mon 8/31

11:20 am-7:45 pm

1 stop22h 25m

$870

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Sat 3/7

12:10 am-9:05 am

2 stops41h 55m

Krabi

Wed 3/11

9:50 am-7:10 pm

2 stops23h 20m

$976

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Tue 3/24

11:50 pm-8:25 pm

2 stops30h 35m

Ko Samui

Thu 4/16

8:10 am-7:30 pm

2 stops25h 20m

$1,065

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 $748. 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 $762.

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 $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 $715 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 62% 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

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 February 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 7.3 961 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,195 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,463 reviews	Search Singapore Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,243 reviews	Search Delta flights
Asiana Airlines	PriceFrom $626	Free Cancellation	Rating 8.1 502 reviews	Search Asiana Airlines flights
ANA	PriceFrom $682	Free Cancellation	Rating 8.4 1,103 reviews	Search ANA flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,350 reviews	Search United Airlines flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 808 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $731	Free Cancellation	Rating 7.6 1,179 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 275 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.