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

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

What airlines fly to Thailand?

Asiana Airlines, EVA Air and Singapore Airlines 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 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 May 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.

$426 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 - 7:50 pm

SEA

HKT

19h 35m

1 stop

10:05 am - 7:10 am

HKT

SEA

36h 05m

1 stop

$657Singapore Airlines

Tue, Oct 20 - Tue, Nov 3

10:15 am - 7:50 pm

SEA

HKT

19h 35m

1 stop

10:05 am - 7:10 am

HKT

SEA

36h 05m

1 stop

$660Singapore Airlines

Tue, Oct 20 - Tue, Nov 3

10:15 am - 7:15 pm

SEA

HKT

19h 00m

1 stop

10:05 am - 8:10 am

HKT

SEA

36h 05m

1 stop

$667Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

10:15 am - 10:50 am

SEA

HKT

34h 35m

1 stop

11:05 am - 8:10 am

HKT

SEA

35h 05m

1 stop

$669Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

12:10 am - 9:50 am

SEA

BKK

18h 40m

1 stop

2:35 am - 6:10 pm

BKK

SEA

30h 35m

1 stop

$1,002China Airlines

Sun, Nov 15 - Mon, Dec 7

12:10 am - 10:40 am

SEA

BKK

20h 30m

1 stop

11:55 pm - 1:55 pm

BKK

SEA

29h 00m

1 stop

$1,015Asiana Airlines

Tue, Oct 20 - Sun, Nov 1

1:15 am - 4:20 pm

SEA

CNX

25h 05m

1 stop

5:20 pm - 4:10 pm

CNX

SEA

36h 50m

1 stop

$1,043STARLUX Airlines

Sun, Sep 27 - Tue, Oct 13

1:15 am - 4:20 pm

SEA

CNX

25h 05m

1 stop

5:20 pm - 4:10 pm

CNX

SEA

36h 50m

1 stop

$1,045STARLUX Airlines

Tue, Oct 6 - Thu, Oct 15

1:30 am - 1:45 pm

SEA

USM

22h 15m

2 stops

11:45 am - 7:40 pm

USM

SEA

21h 55m

2 stops

$1,180EVA Air

Tue, Sep 8 - Wed, Sep 30

1:30 am - 2:45 pm

SEA

USM

23h 15m

2 stops

11:45 am - 7:40 pm

USM

SEA

21h 55m

2 stops

$1,214EVA Air

Sun, Sep 6 - Wed, Sep 30

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets

Philippine Airlines

Aug 23

SEA11:10 pmSeattle/Tacoma Intl

23h 00m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Sep 8

BKK11:40 pmBangkok Suvarnabhumi

34h 25m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$1,014

Philippine Airlines

Aug 11

SEA11:10 pmSeattle/Tacoma Intl

19h 45m

1 stop

BKK8:55 amBangkok Suvarnabhumi

Aug 26

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$1,030

Philippine Airlines

Jun 3

SEA11:10 pmSeattle/Tacoma Intl

23h 00m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Jun 10

BKK10:20 amBangkok Suvarnabhumi

23h 45m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$1,103

Qatar Airways flights from Seattle to Thailand

Our best Qatar Airways deals on Seattle to Thailand flight tickets

Qatar Airways

Oct 7

SEA4:25 pmSeattle/Tacoma Intl

30h 30m

1 stop

BKK12:55 pmBangkok Suvarnabhumi

Oct 14

BKK8:00 pmBangkok Suvarnabhumi

30h 25m

1 stop

SEA12:25 pmSeattle/Tacoma Intl

$1,006

Qatar Airways

Oct 25

SEA5:05 pmSeattle/Tacoma Intl

23h 10m

1 stop

BKK6:15 amBangkok Suvarnabhumi

Nov 9

BKK3:00 amBangkok Suvarnabhumi

23h 40m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$1,024

Qatar Airways

Oct 18

SEA4:25 pmSeattle/Tacoma Intl

37h 00m

1 stop

BKK7:25 pmBangkok Suvarnabhumi

Oct 25

BKK3:00 amBangkok Suvarnabhumi

23h 40m

1 stop

SEA12:40 pmSeattle/Tacoma Intl

$1,027

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

Tue 11/3

10:05 am-7:10 am

1 stop36h 05m

$657

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 10/20

10:15 am-7:50 pm

1 stop19h 35m

Phuket City

Tue 11/3

10:05 am-7:10 am

1 stop36h 05m

$660

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/22

10:15 am-7:15 pm

1 stop19h 00m

Phuket City

Sat 10/31

10:05 am-8:10 am

1 stop36h 05m

$667

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/22

10:15 am-10:50 am

1 stop34h 35m

Phuket City

Sat 10/31

11:05 am-8:10 am

1 stop35h 05m

$669

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/15

12:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

Mon 12/7

2:35 am-6:10 pm

1 stop30h 35m

$1,002

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/20

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Sun 11/1

11:55 pm-1:55 pm

1 stop29h 00m

$1,015

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/27

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Tue 10/13

5:20 pm-4:10 pm

1 stop36h 50m

$1,043

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/6

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

Thu 10/15

5:20 pm-4:10 pm

1 stop36h 50m

$1,045

Quickest round-trip

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Tue 9/8

1:30 am-1:45 pm

2 stops22h 15m

Ko Samui

Wed 9/30

11:45 am-7:40 pm

2 stops21h 55m

$1,180

SeattleKo Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Sun 9/6

1:30 am-2:45 pm

2 stops23h 15m

Ko Samui

Wed 9/30

11:45 am-7:40 pm

2 stops21h 55m

$1,214

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 $498. If you are unable to visit Thailand during the month of September, then departing from Seattle during the month May is also very affordable. Most momondo users find prices during this month for around $500.

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 $868 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 $730 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 43% 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

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 17 as of May 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 7.3 997 reviews	Search Philippine Airlines flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,525 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,096 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $625	Free Cancellation	Rating 8.1 535 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $652	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.3 1,218 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,420 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,763 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,346 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $729	Free Cancellation	Rating 8.3 826 reviews	Search China 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.