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

Singapore Airlines, United Airlines, and China 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 16 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.

$413 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

$674Singapore Airlines

Tue, Oct 20 - Tue, Nov 3

10:15 am - 10:50 am

SEA

HKT

34h 35m

1 stop

8:40 am - 8:10 am

HKT

SEA

37h 30m

1 stop

$684Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

10:15 am - 8:35 am

SEA

HKT

32h 20m

1 stop

10:05 am - 8:10 am

HKT

SEA

36h 05m

1 stop

$685Singapore Airlines

Thu, Oct 15 - Mon, Oct 26

4:30 pm - 3:30 pm

SEA

BKK

33h 00m

1 stop

9:35 am - 2:25 pm

BKK

SEA

18h 50m

1 stop

$962ANA

Wed, Aug 26 - Mon, Sep 7

4:30 pm - 5:55 am

SEA

BKK

23h 25m

1 stop

9:35 am - 2:25 pm

BKK

SEA

18h 50m

1 stop

$965ANA

Mon, Jul 13 - Wed, Jul 29

4:30 pm - 4:35 am

SEA

BKK

22h 05m

1 stop

9:35 am - 2:25 pm

BKK

SEA

18h 50m

1 stop

$972United Airlines

Mon, Sep 7 - Thu, Oct 15

4:30 pm - 4:35 am

SEA

BKK

22h 05m

1 stop

9:10 am - 1:20 pm

BKK

SEA

19h 10m

1 stop

$973United Airlines

Thu, Oct 15 - Mon, Nov 16

1:15 am - 10:20 am

SEA

CNX

19h 05m

1 stop

11:20 am - 7:15 pm

CNX

SEA

21h 55m

1 stop

$1,028China Airlines

Sun, Sep 27 - Tue, Oct 13

1:30 am - 8:45 am

SEA

KBV

41h 15m

2 stops

9:50 am - 7:10 pm

KBV

SEA

23h 20m

2 stops

$1,112EVA Air

Wed, Oct 14 - Mon, Oct 26

1:30 am - 8:45 am

SEA

KBV

41h 15m

2 stops

9:50 am - 6:30 pm

KBV

SEA

22h 40m

2 stops

$1,172EVA Air

Tue, Oct 20 - Tue, Oct 27

Air Canada flights from Seattle to Thailand

Our best Air Canada deals on Seattle to Thailand flight tickets

Air Canada

May 29

SEA5:50 amSeattle/Tacoma Intl

27h 45m

2 stops

BKK11:35 pmBangkok Suvarnabhumi

Jun 7

BKK2:35 amBangkok Suvarnabhumi

25h 45m

2 stops

SEA2:20 pmSeattle/Tacoma Intl

$1,289

Air Canada

May 31

SEA7:20 pmSeattle/Tacoma Intl

38h 00m

2 stops

BKK11:20 pmBangkok Suvarnabhumi

Jun 30

BKK7:45 amBangkok Suvarnabhumi

20h 37m

2 stops

SEA2:22 pmSeattle/Tacoma Intl

$1,309

Air Canada

May 31

SEA7:20 pmSeattle/Tacoma Intl

38h 00m

2 stops

BKK11:20 pmBangkok Suvarnabhumi

Jul 20

BKK7:05 amBangkok Suvarnabhumi

17h 02m

1 stop

SEA10:07 amSeattle/Tacoma Intl

$1,349

Turkish Airlines flights from Seattle to Thailand

Our best Turkish Airlines deals on Seattle to Thailand flight tickets

Turkish Airlines

Jun 2

SEA7:10 pmSeattle/Tacoma Intl

30h 15m

1 stop

BKK3:25 pmBangkok Suvarnabhumi

Jun 12

BKK6:40 amBangkok Suvarnabhumi

24h 35m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

$1,214

Turkish Airlines

Jun 2

SEA7:10 pmSeattle/Tacoma Intl

30h 15m

1 stop

BKK3:25 pmBangkok Suvarnabhumi

Jun 16

BKK6:40 amBangkok Suvarnabhumi

24h 40m

1 stop

SEA5:20 pmSeattle/Tacoma Intl

$1,240

Turkish Airlines

May 28

SEA7:10 pmSeattle/Tacoma Intl

30h 15m

1 stop

BKK3:25 pmBangkok Suvarnabhumi

Jun 12

BKK6:40 amBangkok Suvarnabhumi

24h 35m

1 stop

SEA5:15 pmSeattle/Tacoma Intl

$1,265

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

$674

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

8:40 am-8:10 am

1 stop37h 30m

$684

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/15

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Mon 10/26

10:05 am-8:10 am

1 stop36h 05m

$685

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 8/26

4:30 pm-3:30 pm

1 stop33h 00m

Bangkok Suvarnabhumi

Mon 9/7

9:35 am-2:25 pm

1 stop18h 50m

$962

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 7/13

4:30 pm-5:55 am

1 stop23h 25m

Bangkok Suvarnabhumi

Wed 7/29

9:35 am-2:25 pm

1 stop18h 50m

$965

Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/7

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 10/15

9:35 am-2:25 pm

1 stop18h 50m

$972

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/15

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Mon 11/16

9:10 am-1:20 pm

1 stop19h 10m

$973

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/27

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Tue 10/13

11:20 am-7:15 pm

1 stop21h 55m

$1,028

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Wed 10/14

1:30 am-8:45 am

2 stops41h 15m

Krabi

Mon 10/26

9:50 am-7:10 pm

2 stops23h 20m

$1,112

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Tue 10/20

1:30 am-8:45 am

2 stops41h 15m

Krabi

Tue 10/27

9:50 am-6:30 pm

2 stops22h 40m

$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 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 $867 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 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 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 7.3 998 reviews	Search Philippine Airlines flights
Singapore Airlines	PriceFrom $510	Free Cancellation	Rating 8.2 1,522 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,078 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $625	Free Cancellation	Rating 8.1 534 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 1,213 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,440 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,751 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,342 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.