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, 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 29% 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 June 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.

$409 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

$667Singapore 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

$669Singapore Airlines

Tue, Oct 20 - Fri, Oct 30

11:00 am - 10:55 pm

SEA

CNX

20h 55m

1 stop

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$810Korean Air

Thu, Nov 12 - Sun, Nov 15

12:00 pm - 10:55 pm

SEA

CNX

20h 55m

1 stop

12:15 am - 9:00 am

CNX

SEA

23h 45m

1 stop

$811Korean Air

Tue, Oct 27 - Wed, Nov 11

1:00 pm - 11:35 pm

SEA

BKK

20h 35m

1 stop

2:35 am - 1:37 pm

BKK

SEA

25h 02m

1 stop

$936Delta

Fri, Sep 11 - Sun, Sep 20

11:10 pm - 10:40 pm

SEA

BKK

33h 30m

1 stop

11:40 pm - 7:35 pm

BKK

SEA

33h 55m

1 stop

$940Philippine Airlines

Fri, Oct 9 - Sat, Oct 24

11:55 pm - 12:05 pm

SEA

BKK

21h 10m

1 stop

10:50 pm - 7:35 pm

BKK

SEA

35h 45m

1 stop

$947Philippine Airlines

Sun, Nov 1 - Tue, Nov 10

9:39 pm - 1:05 am

SEA

BKK

37h 26m

2 stops

11:30 pm - 9:49 pm

BKK

SEA

36h 19m

2 stops

$948Delta

Sat, Jul 11 - Sun, Jul 19

12:10 am - 9:15 pm

SEA

KBV

30h 05m

2 stops

9:50 am - 6:10 pm

KBV

SEA

23h 20m

2 stops

$1,114EVA Air

Tue, Nov 10 - Thu, Dec 17

1:30 am - 8:45 am

SEA

KBV

41h 15m

2 stops

9:50 am - 7:10 pm

KBV

SEA

23h 20m

2 stops

$1,172EVA Air

Wed, Oct 21 - Mon, Oct 26

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Delta flights from Seattle to Thailand

Our best Delta deals on Seattle to Thailand flight tickets

Delta

Sep 6

SEA1:00 pmSeattle/Tacoma Intl

19h 10m

1 stop

HKT10:10 pmPhuket City

Sep 13

HKT11:25 pmPhuket City

28h 12m

1 stop

SEA1:37 pmSeattle/Tacoma Intl

$907

Delta

Nov 6

SEA1:00 pmSeattle/Tacoma Intl

42h 10m

1 stop

HKT10:10 pmPhuket City

Nov 25

HKT11:40 pmPhuket City

27h 11m

1 stop

SEA11:51 amSeattle/Tacoma Intl

$918

Delta

Sep 7

SEA1:00 pmSeattle/Tacoma Intl

19h 10m

1 stop

HKT10:10 pmPhuket City

Sep 11

HKT11:25 pmPhuket City

28h 12m

1 stop

SEA1:37 pmSeattle/Tacoma Intl

$920

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets

Hainan Airlines

Aug 27

SEA12:20 pmSeattle/Tacoma Intl

32h 15m

1 stop

BKK10:35 amBangkok Suvarnabhumi

Sep 4

BKK1:50 pmBangkok Suvarnabhumi

33h 10m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$935

Hainan Airlines

Sep 19

SEA11:00 amSeattle/Tacoma Intl

35h 20m

1 stop

BKK12:20 pmBangkok Suvarnabhumi

Sep 25

BKK12:25 amBangkok Suvarnabhumi

22h 35m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$952

Hainan Airlines

Oct 10

SEA11:00 amSeattle/Tacoma Intl

22h 00m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Oct 19

BKK12:25 amBangkok Suvarnabhumi

22h 35m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$992

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

$667

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

$669

Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 11/12

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Sun 11/15

12:15 am-9:00 am

1 stop23h 45m

$810

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/27

12:00 pm-10:55 pm

1 stop20h 55m

Chiang Mai

Wed 11/11

12:15 am-9:00 am

1 stop23h 45m

$811

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 9/11

1:00 pm-11:35 pm

1 stop20h 35m

Bangkok Suvarnabhumi

Sun 9/20

2:35 am-1:37 pm

1 stop25h 02m

$936

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 10/9

11:10 pm-10:40 pm

1 stop33h 30m

Bangkok Suvarnabhumi

Sat 10/24

11:40 pm-7:35 pm

1 stop33h 55m

$940

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/1

11:55 pm-12:05 pm

1 stop21h 10m

Bangkok Suvarnabhumi

Tue 11/10

10:50 pm-7:35 pm

1 stop35h 45m

$947

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 7/11

9:39 pm-1:05 am

2 stops37h 26m

Bangkok Suvarnabhumi

Sun 7/19

11:30 pm-9:49 pm

2 stops36h 19m

$948

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Tue 11/10

12:10 am-9:15 pm

2 stops30h 05m

Krabi

Thu 12/17

9:50 am-6:10 pm

2 stops23h 20m

$1,114

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Wed 10/21

1:30 am-8:45 am

2 stops41h 15m

Krabi

Mon 10/26

9:50 am-7:10 pm

2 stops23h 20m

$1,172

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 April is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $140. If you are unable to visit Thailand during the month of April, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $498.

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 $875 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 52% 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 40m
Direct flights	None

The fastest flight from Seattle to Thailand takes 18h 40m

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 June 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 1,002 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.3 66 reviews	Search Hainan Airlines flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,545 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,212 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $625	Free Cancellation	Rating 8.1 544 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $653	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.3 1,242 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.8 8,410 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,860 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,382 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.