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

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

What airlines fly to Thailand?

Asiana Airlines, Singapore Airlines and EVA Air 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 28% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 18 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 18 as of July 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.

$391 Cheap Flights from Seattle to Thailand in 2026

Discover deals from 900+ travel sites with momondo.

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 - 7:50 pm

SEA

HKT

19h 35m

1 stop

10:05 am - 8:10 am

HKT

SEA

36h 05m

1 stop

$678Singapore Airlines

Tue, Oct 20 - Fri, Oct 30

10:15 am - 7:50 pm

SEA

HKT

19h 35m

1 stop

10:05 am - 8:10 am

HKT

SEA

36h 05m

1 stop

$680Singapore Airlines

Tue, Oct 20 - Fri, Oct 30

10:15 am - 7:50 pm

SEA

HKT

19h 35m

1 stop

10:05 am - 8:10 am

HKT

SEA

36h 05m

1 stop

$686Singapore Airlines

Tue, Oct 20 - Fri, Oct 30

1:55 am - 9:45 am

SEA

BKK

17h 50m

1 stop

5:30 pm - 7:45 pm

BKK

SEA

16h 15m

1 stop

$787China Airlines

Sun, Sep 6 - Mon, Sep 14

1:55 am - 10:20 am

SEA

CNX

18h 25m

1 stop

11:20 am - 7:45 pm

CNX

SEA

22h 25m

1 stop

$840China Airlines

Mon, Sep 7 - Tue, Sep 15

11:00 am - 10:55 pm

SEA

CNX

20h 55m

1 stop

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$868Korean Air

Mon, Nov 9 - Sun, Dec 6

11:00 am - 10:55 pm

SEA

CNX

20h 55m

1 stop

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$869Korean Air

Wed, Nov 4 - Sat, Nov 7

12:10 am - 9:15 pm

SEA

KBV

30h 05m

2 stops

9:50 am - 6:10 pm

KBV

SEA

23h 20m

2 stops

$963EVA Air

Sun, Nov 8 - Mon, Dec 7

11:50 pm - 9:15 pm

SEA

KBV

31h 25m

2 stops

9:50 am - 6:10 pm

KBV

SEA

23h 20m

2 stops

$1,000EVA Air

Sat, Oct 31 - Mon, Nov 30

4:25 pm - 4:50 pm

SEA

UTP

34h 25m

2 stops

1:00 pm - 12:45 pm

UTP

SEA

37h 45m

2 stops

$1,421Qatar Airways

Fri, Sep 25 - Tue, Sep 29

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Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets

Hainan Airlines

Sep 8

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Sep 14

BKK12:25 amBangkok Suvarnabhumi

22h 35m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$798

Hainan Airlines

Aug 25

SEA11:00 amSeattle/Tacoma Intl

35h 20m

1 stop

BKK12:20 pmBangkok Suvarnabhumi

Sep 14

BKK1:50 pmBangkok Suvarnabhumi

33h 10m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$814

China Airlines flights from Seattle to Thailand

Our best China Airlines deals on Seattle to Thailand flight tickets

China Airlines

Sep 6

SEA1:55 amSeattle/Tacoma Intl

17h 50m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Sep 14

BKK5:30 pmBangkok Suvarnabhumi

16h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$787

China Airlines

Aug 22

SEA1:55 amSeattle/Tacoma Intl

24h 25m

1 stop

BKK4:20 pmBangkok Suvarnabhumi

Sep 6

BKK5:30 pmBangkok Suvarnabhumi

16h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$810

China Airlines

Aug 25

SEA1:55 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Sep 14

BKK10:50 amBangkok Suvarnabhumi

22h 55m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$811

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 10/20

10:15 am-7:50 pm

1 stop19h 35m

Phuket City

Fri 10/30

10:05 am-8:10 am

1 stop36h 05m

$678

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 10/20

10:15 am-7:50 pm

1 stop19h 35m

Phuket City

Fri 10/30

10:05 am-8:10 am

1 stop36h 05m

$680

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 10/20

10:15 am-7:50 pm

1 stop19h 35m

Phuket City

Fri 10/30

10:05 am-8:10 am

1 stop36h 05m

$686

Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 9/6

1:55 am-9:45 am

1 stop17h 50m

Bangkok Suvarnabhumi

Mon 9/14

5:30 pm-7:45 pm

1 stop16h 15m

$787

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/7

1:55 am-10:20 am

1 stop18h 25m

Chiang Mai

Tue 9/15

11:20 am-7:45 pm

1 stop22h 25m

$840

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 11/9

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Sun 12/6

12:15 am-9:00 am

1 stop23h 45m

$868

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Wed 11/4

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Sat 11/7

12:15 am-9:00 am

1 stop23h 45m

$869

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Sun 11/8

12:10 am-9:15 pm

2 stops30h 05m

Krabi

Mon 12/7

9:50 am-6:10 pm

2 stops23h 20m

$963

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Sat 10/31

11:50 pm-9:15 pm

2 stops31h 25m

Krabi

Mon 11/30

9:50 am-6:10 pm

2 stops23h 20m

$1,000

SeattleRayong

SEA - UTP

SEAUTP

Seattle/Tacoma Intl

Fri 9/25

4:25 pm-4:50 pm

2 stops34h 25m

Utapao Rayong Pattaya

Tue 9/29

1:00 pm-12:45 pm

2 stops37h 45m

$1,421

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 March is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $750. If you are unable to visit Thailand during the month of March, then departing from Seattle during the month October is also very affordable. Most momondo users find prices during this month for around $766.

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 $886 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 $777 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 16% 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 45m
Direct flights	None

The fastest flight from Seattle to Thailand takes 18h 45m

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 18 as of July 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 $149	Free Cancellation	Rating 7.3 1,011 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.3 68 reviews	Search Hainan Airlines flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,486 reviews	Search Delta flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,583 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $623	Free Cancellation	Rating 8.1 555 reviews	Search Asiana Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,390 reviews	Search Air Canada flights
Korean Air	PriceFrom $652	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean Air flights
ANA	PriceFrom $685	Free Cancellation	Rating 8.3 1,283 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.4 10,042 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,431 reviews	Search Cathay Pacific 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.