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

Singapore 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 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 33% 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.

$278 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 - 7:50 am

SEA

HKT

32h 05m

1 stop

8:40 am - 8:10 am

HKT

SEA

37h 30m

1 stop

$639Singapore Airlines

Sun, Mar 8 - Thu, Mar 19

9:45 am - 9:15 am

SEA

HKT

33h 30m

1 stop

9:55 am - 8:45 am

HKT

SEA

36h 50m

1 stop

$641Singapore Airlines

Sun, Mar 8 - Thu, Apr 16

11:10 pm - 12:10 pm

SEA

BKK

23h 00m

1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m

1 stop

$648Philippine Airlines

Tue, Apr 21 - Tue, May 5

12:55 am - 11:10 pm

SEA

BKK

32h 15m

1 stop

12:20 pm - 3:25 pm

BKK

SEA

17h 05m

1 stop

$650Asiana Airlines

Mon, Jul 27 - Tue, Aug 11

12:55 am - 11:15 am

SEA

BKK

20h 20m

1 stop

1:20 am - 2:55 pm

BKK

SEA

27h 35m

1 stop

$651Asiana Airlines

Sun, Apr 12 - Wed, Apr 22

7:06 pm - 2:15 pm

SEA

BKK

29h 09m

2 stops

12:15 pm - 8:45 am

BKK

SEA

34h 30m

1 stop

$652Multiple Airlines

Wed, Apr 22 - Wed, Apr 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

$761China Airlines

Mon, Apr 6 - Tue, Apr 21

11:45 pm - 3:55 pm

SEA

CNX

25h 10m

1 stop

4:55 pm - 3:05 pm

CNX

SEA

37h 10m

1 stop

$819STARLUX Airlines

Thu, Feb 26 - Thu, Mar 5

12:10 am - 9:50 pm

SEA

KBV

30h 40m

2 stops

9:50 am - 6:10 pm

KBV

SEA

23h 20m

2 stops

$871EVA Air

Tue, Feb 24 - Wed, Mar 4

1:50 am - 1:45 pm

SEA

USM

21h 55m

2 stops

9:00 pm - 6:50 pm

USM

SEA

35h 50m

2 stops

$975EVA Air

Tue, May 5 - Fri, May 15

Asiana Airlines flights from Seattle to Thailand

Our best Asiana Airlines deals on Seattle to Thailand flight tickets

Asiana Airlines

Jul 27

SEA12:55 amSeattle/Tacoma Intl

20h 20m

1 stop

BKK11:15 amBangkok Suvarnabhumi

Aug 11

BKK12:20 pmBangkok Suvarnabhumi

17h 05m

1 stop

SEA3:25 pmSeattle/Tacoma Intl

$650

Asiana Airlines

Apr 12

SEA12:55 amSeattle/Tacoma Intl

20h 20m

1 stop

BKK11:15 amBangkok Suvarnabhumi

Apr 22

BKK1:20 amBangkok Suvarnabhumi

27h 35m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$651

Asiana Airlines

Mar 9

SEA12:10 amSeattle/Tacoma Intl

31h 50m

1 stop

BKK10:00 pmBangkok Suvarnabhumi

Mar 24

BKK11:55 pmBangkok Suvarnabhumi

29h 00m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$654

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets

Hainan Airlines

Mar 10

SEA11:00 amSeattle/Tacoma Intl

22h 25m

1 stop

BKK11:25 pmBangkok Suvarnabhumi

Mar 23

BKK1:05 amBangkok Suvarnabhumi

21h 55m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$680

Hainan Airlines

Apr 4

SEA11:00 amSeattle/Tacoma Intl

35h 20m

1 stop

BKK12:20 pmBangkok Suvarnabhumi

Apr 17

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$687

Hainan Airlines

Mar 12

SEA11:05 amSeattle/Tacoma Intl

41h 00m

2 stops

BKK6:05 pmBangkok Suvarnabhumi

Mar 30

BKK12:40 amBangkok Suvarnabhumi

22h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$689

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 3/8

9:45 am-7:50 am

1 stop32h 05m

Phuket City

Thu 3/19

8:40 am-8:10 am

1 stop37h 30m

$639

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 3/8

9:45 am-9:15 am

1 stop33h 30m

Phuket City

Thu 4/16

9:55 am-8:45 am

1 stop36h 50m

$641

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 4/21

11:10 pm-12:10 pm

1 stop23h 00m

Bangkok Suvarnabhumi

Tue 5/5

1:25 pm-8:05 pm

1 stop20h 40m

$648

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 7/27

12:55 am-11:10 pm

1 stop32h 15m

Bangkok Suvarnabhumi

Tue 8/11

12:20 pm-3:25 pm

1 stop17h 05m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/12

12:55 am-11:15 am

1 stop20h 20m

Bangkok Suvarnabhumi

Wed 4/22

1:20 am-2:55 pm

1 stop27h 35m

$651

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 4/22

7:06 pm-2:15 pm

2 stops29h 09m

Bangkok Suvarnabhumi

Wed 4/29

12:15 pm-8:45 am

1 stop34h 30m

$652

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 4/6

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Tue 4/21

11:20 am-7:15 pm

1 stop21h 55m

$761

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 2/26

11:45 pm-3:55 pm

1 stop25h 10m

Chiang Mai

Thu 3/5

4:55 pm-3:05 pm

1 stop37h 10m

$819

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Tue 2/24

12:10 am-9:50 pm

2 stops30h 40m

Krabi

Wed 3/4

9:50 am-6:10 pm

2 stops23h 20m

$871

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Tue 5/5

1:50 am-1:45 pm

2 stops21h 55m

Ko Samui

Fri 5/15

9:00 pm-6:50 pm

2 stops35h 50m

$975

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 $766.

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 $883 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 $747 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	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 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 $154	Free Cancellation	Rating 7.3 957 reviews	Search Philippine Airlines flights
Korean Air	PriceFrom $418	Free Cancellation	Rating 8.4 1,188 reviews	Search Korean Air flights
Singapore Airlines	PriceFrom $520	Free Cancellation	Rating 8.2 1,440 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $615	Free Cancellation	Rating 8.1 501 reviews	Search Asiana Airlines flights
ANA	PriceFrom $683	Free Cancellation	Rating 8.4 1,078 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,127 reviews	Search Delta flights
United Airlines	PriceFrom $700	Free Cancellation	Rating 7.4 9,215 reviews	Search United Airlines flights
China Airlines	PriceFrom $730	Free Cancellation	Rating 8.3 802 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,148 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 268 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.