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

Singapore Airlines, Hainan Airlines, and Philippine 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 29% 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.

$271 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

8:10 pm - 8:45 am

HKT

SEA

26h 35m

1 stop

$575Singapore Airlines

Thu, Apr 16 - Thu, Apr 23

10:15 am - 11:00 am

SEA

BKK

34h 45m

1 stop

8:35 pm - 8:45 am

BKK

SEA

26h 10m

1 stop

$617Singapore Airlines

Tue, Aug 25 - Fri, Sep 4

11:10 pm - 10:40 pm

SEA

BKK

33h 30m

1 stop

11:40 pm - 8:05 pm

BKK

SEA

34h 25m

1 stop

$622Philippine Airlines

Sun, Apr 26 - Mon, May 11

11:10 pm - 12:10 pm

SEA

BKK

23h 00m

1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m

1 stop

$639Philippine Airlines

Tue, Sep 1 - Tue, Sep 8

12:55 am - 10:40 am

SEA

BKK

19h 45m

1 stop

11:45 am - 2:55 pm

BKK

SEA

17h 10m

1 stop

$650Asiana Airlines

Sun, Apr 26 - Tue, May 12

12:55 am - 10:40 am

SEA

BKK

19h 45m

1 stop

11:45 am - 2:55 pm

BKK

SEA

17h 10m

1 stop

$651Asiana Airlines

Sun, Aug 16 - Fri, Sep 25

1:55 am - 10:20 am

SEA

CNX

18h 25m

1 stop

11:20 am - 7:45 pm

CNX

SEA

22h 25m

1 stop

$849China Airlines

Sun, Aug 16 - Mon, Aug 24

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$856China Airlines

Mon, Apr 6 - Thu, Apr 23

1:30 am - 10:25 am

SEA

CNX

18h 55m

1 stop

11:35 am - 7:30 pm

CNX

SEA

21h 55m

1 stop

$865EVA Air

Wed, Apr 15 - Thu, Apr 23

1:30 am - 1:45 pm

SEA

USM

22h 15m

2 stops

1:50 pm - 7:30 pm

USM

SEA

19h 40m

2 stops

$996EVA Air

Wed, Apr 15 - Thu, Apr 23

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

May 20

BKK11:20 amBangkok Suvarnabhumi

35h 45m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$688

Hainan Airlines

Apr 7

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

May 20

BKK11:20 amBangkok Suvarnabhumi

35h 45m

1 stop

SEA9:05 amSeattle/Tacoma Intl

$689

Hainan Airlines

Apr 7

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

May 1

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$711

Singapore Airlines flights from Seattle to Thailand

Our best Singapore Airlines deals on Seattle to Thailand flight tickets

Singapore Airlines

Apr 16

SEA10:15 amSeattle/Tacoma Intl

40h 55m

1 stop

HKT5:10 pmPhuket City

Apr 23

HKT8:10 pmPhuket City

26h 35m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$575

Singapore Airlines

Apr 12

SEA10:15 amSeattle/Tacoma Intl

34h 45m

1 stop

BKK11:00 amBangkok Suvarnabhumi

Apr 28

BKK3:30 pmBangkok Suvarnabhumi

31h 59m

2 stops

SEA9:29 amSeattle/Tacoma Intl

$649

Singapore Airlines

Apr 12

SEA10:15 amSeattle/Tacoma Intl

41h 00m

1 stop

BKK5:15 pmBangkok Suvarnabhumi

Apr 28

BKK3:30 pmBangkok Suvarnabhumi

31h 59m

2 stops

SEA9:29 amSeattle/Tacoma Intl

$654

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 4/16

10:15 am-5:10 pm

1 stop40h 55m

Phuket City

Thu 4/23

8:10 pm-8:45 am

1 stop26h 35m

$575

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/25

10:15 am-11:00 am

1 stop34h 45m

Bangkok Suvarnabhumi

Fri 9/4

8:35 pm-8:45 am

1 stop26h 10m

$617

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/26

11:10 pm-10:40 pm

1 stop33h 30m

Bangkok Suvarnabhumi

Mon 5/11

11:40 pm-8:05 pm

1 stop34h 25m

$622

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/1

11:10 pm-12:10 pm

1 stop23h 00m

Bangkok Suvarnabhumi

Tue 9/8

1:25 pm-8:05 pm

1 stop20h 40m

$639

Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/26

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

Tue 5/12

11:45 am-2:55 pm

1 stop17h 10m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/16

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

Fri 9/25

11:45 am-2:55 pm

1 stop17h 10m

$651

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 8/16

1:55 am-10:20 am

1 stop18h 25m

Chiang Mai

Mon 8/24

11:20 am-7:45 pm

1 stop22h 25m

$849

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 4/6

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Thu 4/23

11:20 am-7:15 pm

1 stop21h 55m

$856

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Wed 4/15

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Thu 4/23

11:35 am-7:30 pm

1 stop21h 55m

$865

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Wed 4/15

1:30 am-1:45 pm

2 stops22h 15m

Ko Samui

Thu 4/23

1:50 pm-7:30 pm

2 stops19h 40m

$996

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 $764.

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 $873 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 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 7.3 965 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,197 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $509	Free Cancellation	Rating 8.2 1,468 reviews	Search Singapore Airlines flights
Delta	PriceFrom $544	Free Cancellation	Rating 7.9 8,258 reviews	Search Delta flights
Asiana Airlines	PriceFrom $627	Free Cancellation	Rating 8.1 502 reviews	Search Asiana Airlines flights
ANA	PriceFrom $681	Free Cancellation	Rating 8.4 1,112 reviews	Search ANA flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,403 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $704	Free Cancellation	Rating 7.6 1,193 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 809 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 279 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.