What airlines fly to Thailand?

Asiana Airlines, EVA Air and Singapore Airlines are the top three most popular airlines that fly to Thailand from State of Washington 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.

How long is the flight from State of Washington to Thailand?

The flight from State of Washington to Thailand depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Bangkok Suvarnabhumi Airport (the most popular airport in Thailand), then the flight time is 18h 40m on average. If you fly from Spokane (another popular airport in State of Washington) to Bangkok Suvarnabhumi Airport, then the average flight time is 24h.

What is the cheapest airline that flies from Washington to Thailand?

Singapore Airlines, United Airlines, and American Airlines are the most popular carriers operating from Washington to Thailand

When did momondo last update prices for flights from Washington to Thailand?

Prices for flights from Washington to Thailand are updated daily.

How many operators does momondo search for flights from Washington to Thailand?

There are 17 operators available for flights from Washington to Thailand as of May 2026.

How old do you have to be to fly from Washington to Thailand?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Thailand.

What documentation or ID do you need to fly to Thailand?

The travel and health documents required for your trip to Thailand can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Thailand. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$426 Cheap Flights from Washington to Thailand in 2026

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Find the cheapest flights from Washington 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

$660Singapore Airlines

Tue, Oct 20 - Tue, Nov 3

10:15 am - 10:50 am

SEA

HKT

34h 35m

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 - 8:35 am

SEA

HKT

32h 20m

1 stop

8:40 am - 8:10 am

HKT

SEA

37h 30m

1 stop

$682Singapore Airlines

Thu, Oct 22 - Sat, Oct 31

6:06 am - 8:00 pm

PDX

BKK

23h 54m

2 stops

9:10 pm - 12:22 pm

BKK

PDX

30h 12m

2 stops

$879Multiple Airlines

Tue, Oct 27 - Tue, Dec 8

7:43 pm - 8:00 pm

GEG

BKK

34h 17m

2 stops

8:00 pm - 11:32 am

BKK

GEG

30h 32m

2 stops

$885Multiple Airlines

Mon, Oct 26 - Mon, Nov 2

6:51 pm - 11:25 am

SEA

BKK

25h 34m

2 stops

7:10 am - 2:18 pm

BKK

SEA

22h 08m

2 stops

$989United Airlines

Tue, Nov 3 - Tue, Nov 24

1:55 am - 12:10 pm

SEA

BKK

20h 15m

1 stop

5:30 pm - 7:45 pm

BKK

SEA

16h 15m

1 stop

$1,002China Airlines

Sat, Aug 22 - Sun, Aug 30

6:51 pm - 11:25 am

SEA

BKK

25h 34m

2 stops

4:55 pm - 11:21 pm

BKK

SEA

21h 26m

2 stops

$1,006United Airlines

Mon, Nov 2 - Mon, Nov 23

4:30 pm - 4:35 am

SEA

BKK

22h 05m

1 stop

9:35 am - 2:25 pm

BKK

SEA

18h 50m

1 stop

$1,008ANA

Thu, Jul 30 - Wed, Aug 26

8:45 am - 10:15 pm

SEA

BKK

23h 30m

2 stops

9:35 am - 2:25 pm

BKK

SEA

18h 50m

1 stop

$1,011ANA

Thu, Jul 9 - Tue, Jul 28

China Airlines flights from State of Washington to Thailand

Our best China Airlines deals on State of Washington to Thailand flight tickets

China Airlines

Aug 22

SEA1:55 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK12:10 pmBangkok Suvarnabhumi

Aug 30

BKK5:30 pmBangkok Suvarnabhumi

16h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$1,002

China Airlines

Aug 22

SEA1:55 amSeattle/Tacoma Intl

17h 50m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Aug 30

BKK5:30 pmBangkok Suvarnabhumi

16h 15m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

$1,020

China Airlines

Aug 15

SEA1:55 amSeattle/Tacoma Intl

17h 50m

1 stop

BKK9:45 amBangkok Suvarnabhumi

Oct 12

BKK5:30 pmBangkok Suvarnabhumi

15h 45m

1 stop

SEA7:15 pmSeattle/Tacoma Intl

$1,047

Air Canada flights from State of Washington to Thailand

Our best Air Canada deals on State of Washington to Thailand flight tickets

Air Canada

Sep 14

PDX10:10 amPortland

28h 55m

1 stop

BKK5:05 amBangkok Suvarnabhumi

Sep 28

BKK7:05 amBangkok Suvarnabhumi

26h 01m

1 stop

PDX7:06 pmPortland

$1,154

Air Canada

Nov 1

PDX3:15 pmPortland

24h 15m

1 stop

BKK6:30 amBangkok Suvarnabhumi

Nov 23

BKK9:40 amBangkok Suvarnabhumi

26h 06m

2 stops

PDX8:46 pmPortland

$1,161

Air Canada

Sep 16

PDX7:45 pmPortland

19h 20m

1 stop

BKK5:05 amBangkok Suvarnabhumi

Sep 28

BKK7:05 amBangkok Suvarnabhumi

16h 26m

1 stop

PDX9:31 amPortland

$1,164

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

$660

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

10:05 am-8:10 am

1 stop36h 05m

$667

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 10/22

10:15 am-8:35 am

1 stop32h 20m

Phuket City

Sat 10/31

8:40 am-8:10 am

1 stop37h 30m

$682

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Tue 10/27

6:06 am-8:00 pm

2 stops23h 54m

Bangkok Suvarnabhumi

Tue 12/8

9:10 pm-12:22 pm

2 stops30h 12m

$879

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 10/26

7:43 pm-8:00 pm

2 stops34h 17m

Bangkok Suvarnabhumi

Mon 11/2

8:00 pm-11:32 am

2 stops30h 32m

$885

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/3

6:51 pm-11:25 am

2 stops25h 34m

Bangkok Suvarnabhumi

Tue 11/24

7:10 am-2:18 pm

2 stops22h 08m

$989

Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 8/22

1:55 am-12:10 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Sun 8/30

5:30 pm-7:45 pm

1 stop16h 15m

$1,002

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 11/2

6:51 pm-11:25 am

2 stops25h 34m

Bangkok Suvarnabhumi

Mon 11/23

4:55 pm-11:21 pm

2 stops21h 26m

$1,006

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 7/30

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Wed 8/26

9:35 am-2:25 pm

1 stop18h 50m

$1,008

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 7/9

8:45 am-10:15 pm

2 stops23h 30m

Bangkok Suvarnabhumi

Tue 7/28

9:35 am-2:25 pm

1 stop18h 50m

$1,011

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 State of Washington 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

Other information

What is the cheapest month to fly to Thailand?

The month of September is, on average, the cheapest month to fly to Thailand from State of Washington, with most prices found around $498. If you are unable to visit Thailand during the month of September, then departing from State of Washington 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 Washington to Thailand?

You are more likely to see cheaper flights to Thailand from State of Washington 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 State of Washington for as low as $730 on momondo.

Can stopping save me money on State of Washington to Thailand flights?

You could potentially save up to 2% on your flight if you consider stops on a State of Washington to Thailand flight.

Cheap State of Washington to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Thailand

Fastest flight time	18h 25m
Direct flights	None

The fastest flight from State of Washington to Thailand takes 18h 25m

There are no direct flights from State of Washington to Thailand. There are no popular flight routes from State of Washington to Thailand.

Search flight deals

Frequently asked questions about flying from Washington to Thailand

When did momondo last update prices for flights from Washington to Thailand?
Prices for flights from Washington to Thailand are updated daily.
How many operators does momondo search for flights from Washington to Thailand?
There are 17 operators available for flights from Washington to Thailand as of May 2026.
How old do you have to be to fly from Washington to Thailand?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Thailand.
What documentation or ID do you need to fly to Thailand?
The travel and health documents required for your trip to Thailand can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Thailand. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from State of Washington to Thailand

Compare and see reviews for airlines that fly from State of Washington 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 1,522 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $623	Free Cancellation	Rating 7.1 11,090 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 1,215 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,425 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,749 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $705	Free Cancellation	Rating 7.6 1,344 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 Washington to Thailand?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Thailand. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Thailand with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Thailand from Washington with this policy.

How can momondo help me find flights from Washington to Thailand?

momondo helps you find the best flight between Washington and Thailand by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington to Thailand right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington 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.