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

Singapore Airlines, Korean Air, and Delta 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 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.

$312 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

$674Singapore 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

$675Singapore Airlines

Tue, Oct 20 - Fri, Oct 30

10:15 am - 7:15 pm

SEA

HKT

19h 00m

1 stop

11:05 am - 8:10 am

HKT

SEA

35h 05m

1 stop

$683Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

10:15 am - 7:15 pm

SEA

HKT

19h 00m

1 stop

11:05 am - 8:10 am

HKT

SEA

35h 05m

1 stop

$684Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

9:30 pm - 12:05 pm

SEA

BKK

23h 35m

1 stop

10:50 pm - 6:30 pm

BKK

SEA

34h 40m

1 stop

$817Philippine Airlines

Thu, Nov 12 - Tue, Feb 9

7:20 am - 11:35 pm

SEA

BKK

26h 15m

2 stops

9:50 am - 9:59 pm

BKK

SEA

26h 09m

2 stops

$830Korean Air

Mon, Aug 3 - Mon, Aug 17

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 2 - Wed, Nov 11

11:45 pm - 4:00 pm

SEA

CNX

25h 15m

1 stop

5:00 pm - 3:05 pm

CNX

SEA

37h 05m

1 stop

$946STARLUX Airlines

Thu, Nov 5 - Sat, Nov 14

1:10 am - 8:45 am

SEA

KBV

41h 35m

2 stops

9:25 am - 7:50 pm

KBV

SEA

24h 25m

2 stops

$1,115EVA Air

Tue, Aug 18 - Wed, Aug 26

1:30 am - 9:05 am

SEA

KBV

41h 35m

2 stops

9:50 am - 7:10 pm

KBV

SEA

23h 20m

2 stops

$1,152EVA Air

Thu, Oct 22 - Thu, Oct 29

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Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets

Philippine Airlines

Nov 12

SEA9:30 pmSeattle/Tacoma Intl

23h 35m

1 stop

BKK12:05 pmBangkok Suvarnabhumi

Feb 9

BKK10:50 pmBangkok Suvarnabhumi

34h 40m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$817

Philippine Airlines

Nov 19

SEA11:55 pmSeattle/Tacoma Intl

30h 55m

1 stop

BKK9:50 pmBangkok Suvarnabhumi

Dec 3

BKK1:30 pmBangkok Suvarnabhumi

20h 05m

1 stop

SEA6:35 pmSeattle/Tacoma Intl

$832

Philippine Airlines

Aug 16

SEA11:10 pmSeattle/Tacoma Intl

19h 45m

1 stop

BKK8:55 amBangkok Suvarnabhumi

Aug 23

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$833

Delta flights from Seattle to Thailand

Our best Delta deals on Seattle to Thailand flight tickets

Delta

Sep 28

SEA1:00 pmSeattle/Tacoma Intl

20h 35m

1 stop

BKK11:35 pmBangkok Suvarnabhumi

Oct 22

BKK9:50 amBangkok Suvarnabhumi

17h 24m

1 stop

SEA1:14 pmSeattle/Tacoma Intl

$865

Delta

Jul 17

SEA1:05 pmSeattle/Tacoma Intl

20h 30m

1 stop

BKK11:35 pmBangkok Suvarnabhumi

Aug 30

BKK9:40 pmBangkok Suvarnabhumi

29h 57m

1 stop

SEA1:37 pmSeattle/Tacoma Intl

$905

Delta

Nov 2

SEA1:00 pmSeattle/Tacoma Intl

42h 10m

1 stop

HKT10:10 pmPhuket City

Nov 15

HKT11:40 pmPhuket City

27h 11m

1 stop

SEA11:51 amSeattle/Tacoma Intl

$965

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

$674

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

$675

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

11:05 am-8:10 am

1 stop35h 05m

$683

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

11:05 am-8:10 am

1 stop35h 05m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 11/12

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Tue 2/9

10:50 pm-6:30 pm

1 stop34h 40m

$817

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/3

7:20 am-11:35 pm

2 stops26h 15m

Bangkok Suvarnabhumi

Mon 8/17

9:50 am-9:59 pm

2 stops26h 09m

$830

Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 11/2

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

Wed 11/11

12:15 am-9:00 am

1 stop23h 45m

$868

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 11/5

11:45 pm-4:00 pm

1 stop25h 15m

Chiang Mai

Sat 11/14

5:00 pm-3:05 pm

1 stop37h 05m

$946

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Tue 8/18

1:10 am-8:45 am

2 stops41h 35m

Krabi

Wed 8/26

9:25 am-7:50 pm

2 stops24h 25m

$1,115

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Thu 10/22

1:30 am-9:05 am

2 stops41h 35m

Krabi

Thu 10/29

9:50 am-7:10 pm

2 stops23h 20m

$1,152

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 July is also very affordable. Most momondo users find prices during this month for around $425.

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 $878 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 $740 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 51% 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 50m
Direct flights	None

The fastest flight from Seattle to Thailand takes 18h 50m

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 1,006 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.3 67 reviews	Search Hainan Airlines flights
Delta	PriceFrom $459	Free Cancellation	Rating 7.8 8,452 reviews	Search Delta flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,563 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $623	Free Cancellation	Rating 8.1 550 reviews	Search Asiana Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,308 reviews	Search Air Canada flights
Korean Air	PriceFrom $652	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean Air flights
ANA	PriceFrom $680	Free Cancellation	Rating 8.3 1,263 reviews	Search ANA flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,940 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,403 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.