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

Philippine Airlines, Asiana Airlines, and Korean Air are the most popular carriers operating from Washington to Bangkok

What airlines fly to Bangkok?

EVA Air, China Airlines and Asiana Airlines are the top three most popular airlines that fly to Bangkok from State of Washington according to our data. EVA Air is the first choice among our users, with 28% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 17 different airlines that fly to Bangkok on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Bangkok?

Flight times from State of Washington to Bangkok vary, but if you’re flying out of Seattle and flying into Bangkok Suvarnabhumi Airport (one of the most popular routes), then the duration is 20h 15m on average. Another popular route from State of Washington to Bangkok is flying from Spokane to Bangkok Suvarnabhumi Airport, which will take roughly 23h 25m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from Washington to Bangkok are updated daily.

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

There are 18 operators available for flights from Washington to Bangkok as of October 2025.

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

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 Bangkok.

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

The travel and health documents required for your trip to Bangkok 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 Bangkok. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$342 Cheap Flights from Washington to Bangkok in 2025/26

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Cheap round-trip flights

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9:30 pm - 11:00 pmSEA-BKK

34h 30m1 stop

11:50 pm - 6:40 pmBKK-SEA

33h 50m1 stop

$661Philippine Airlines

Find Deal

Wed, Nov 26 - Wed, Dec 3

9:30 pm - 5:50 pmSEA-BKK

29h 20m1 stop

1:20 pm - 6:40 pmBKK-SEA

20h 20m1 stop

$662Philippine Airlines

Find Deal

Wed, Nov 26 - Wed, Dec 10

12:00 pm - 9:30 pmSEA-BKK

19h 30m1 stop

12:55 am - 9:00 amBKK-SEA

23h 05m1 stop

$663Korean Air

Find Deal

Mon, Oct 27 - Sat, Nov 8

12:10 am - 10:00 pmSEA-BKK

30h 50m1 stop

11:55 pm - 1:55 pmBKK-SEA

29h 00m1 stop

$664Asiana Airlines

Find Deal

Tue, Nov 4 - Wed, Nov 12

8:45 am - 6:45 pmSEA-BKK

43h 00m1 stop

8:00 pm - 2:18 pmBKK-SEA

33h 18m2 stops

$665Multiple Airlines

Find Deal

Sun, Jan 25 - Sun, Feb 8

12:00 pm - 9:30 pmSEA-BKK

19h 30m1 stop

9:40 am - 9:00 amBKK-SEA

38h 20m1 stop

$666Korean Air

Find Deal

Mon, Oct 27 - Sun, Nov 9

12:10 am - 10:00 pmSEA-BKK

30h 50m1 stop

12:20 pm - 1:55 pmBKK-SEA

16h 35m1 stop

$667Asiana Airlines

Find Deal

Sun, Nov 23 - Sun, Nov 30

12:00 pm - 12:55 amSEA-BKK

22h 55m1 stop

9:40 am - 10:00 amBKK-SEA

38h 20m1 stop

$668Korean Air

Find Deal

Sun, Mar 8 - Sun, Mar 22

3:40 pm - 6:30 amSEA-BKK

23h 50m1 stop

9:10 am - 1:20 pmBKK-SEA

19h 10m1 stop

$674ANA

Find Deal

Tue, Dec 2 - Wed, Dec 17

8:45 am - 5:00 pmSEA-BKK

41h 15m1 stop

9:35 am - 12:11 amBKK-SEA

29h 36m2 stops

$684Multiple Airlines

Find Deal

Sat, Feb 7 - Sun, Feb 15

Philippine Airlines flights from State of Washington to Bangkok

Our best Philippine Airlines deals on State of Washington to Bangkok flight tickets

Philippine Airlines

Nov 26

SEA9:30 pmSeattle/Tacoma Intl

34h 30m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Dec 3

BKK11:50 pmBangkok Suvarnabhumi

33h 50m

1 stop

SEA6:40 pmSeattle/Tacoma Intl

$661

Find similar

Philippine Airlines

Nov 26

SEA9:30 pmSeattle/Tacoma Intl

29h 20m

1 stop

BKK5:50 pmBangkok Suvarnabhumi

Dec 10

BKK1:20 pmBangkok Suvarnabhumi

20h 20m

1 stop

SEA6:40 pmSeattle/Tacoma Intl

$662

Find similar

Philippine Airlines

Mar 5

SEA9:30 pmSeattle/Tacoma Intl

29h 20m

1 stop

BKK5:50 pmBangkok Suvarnabhumi

Mar 14

BKK11:50 pmBangkok Suvarnabhumi

33h 50m

1 stop

SEA7:40 pmSeattle/Tacoma Intl

$675

Find similar

Korean Air flights from State of Washington to Bangkok

Our best Korean Air deals on State of Washington to Bangkok flight tickets

Korean Air

Oct 27

SEA12:00 pmSeattle/Tacoma Intl

19h 30m

1 stop

BKK9:30 pmBangkok Suvarnabhumi

Nov 8

BKK12:55 amBangkok Suvarnabhumi

23h 05m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$663

Find similar

Korean Air

Oct 27

SEA12:00 pmSeattle/Tacoma Intl

19h 30m

1 stop

BKK9:30 pmBangkok Suvarnabhumi

Nov 9

BKK9:40 amBangkok Suvarnabhumi

38h 20m

1 stop

SEA9:00 amSeattle/Tacoma Intl

$666

Find similar

Korean Air

Mar 8

SEA12:00 pmSeattle/Tacoma Intl

22h 55m

1 stop

BKK12:55 amBangkok Suvarnabhumi

Mar 22

BKK9:40 amBangkok Suvarnabhumi

38h 20m

1 stop

SEA10:00 amSeattle/Tacoma Intl

$668

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/26

9:30 pm-11:00 pm

1 stop34h 30m

Bangkok Suvarnabhumi

Wed 12/3

11:50 pm-6:40 pm

1 stop33h 50m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 11/26

9:30 pm-5:50 pm

1 stop29h 20m

Bangkok Suvarnabhumi

Wed 12/10

1:20 pm-6:40 pm

1 stop20h 20m

$662

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 10/27

12:00 pm-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Sat 11/8

12:55 am-9:00 am

1 stop23h 05m

$663

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/4

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Wed 11/12

11:55 pm-1:55 pm

1 stop29h 00m

$664

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/25

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

Sun 2/8

8:00 pm-2:18 pm

2 stops33h 18m

$665

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 10/27

12:00 pm-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Sun 11/9

9:40 am-9:00 am

1 stop38h 20m

$666

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/23

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Sun 11/30

12:20 pm-1:55 pm

1 stop16h 35m

$667

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/8

12:00 pm-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Sun 3/22

9:40 am-10:00 am

1 stop38h 20m

$668

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 12/2

3:40 pm-6:30 am

1 stop23h 50m

Bangkok Suvarnabhumi

Wed 12/17

9:10 am-1:20 pm

1 stop19h 10m

$674

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/7

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Sun 2/15

9:35 am-12:11 am

2 stops29h 36m

$684

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 Bangkok

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 Bangkok?

If you aren’t able to travel during the month of September, then book flights to Bangkok from State of Washington during February instead. Flights to Bangkok in February, while not as cheap as those in September, still average around $763.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from State of Washington is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $931. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from State of Washington to Bangkok on a Friday will generally be more expensive and average around $1,111. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Bangkok?

According to our data, the cheapest time of day to fly to Bangkok is in the morning. momondo users have found flights departing from State of Washington to Bangkok in the morning for as low as $986. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,081. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $899 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from State of Washington for as low as $744 on momondo.

Cheap State of Washington to Bangkok flight deals and tips

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

Direct flights	None

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

Search flight deals

When did momondo last update prices for flights from Washington to Bangkok?
Prices for flights from Washington to Bangkok are updated daily.
How many operators does momondo search for flights from Washington to Bangkok?
There are 18 operators available for flights from Washington to Bangkok as of October 2025.
How old do you have to be to fly from Washington to Bangkok?
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 Bangkok.
What documentation or ID do you need to fly to Bangkok?
The travel and health documents required for your trip to Bangkok 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 Bangkok. 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 Bangkok

Compare and see reviews for airlines that fly from State of Washington to Bangkok with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $433	Free Cancellation	Rating 7.9 7,973 reviews	Search Delta flights
Singapore Airlines	PriceFrom $524	Free Cancellation	Rating 8.1 1,379 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $605	Free Cancellation	Rating 7.3 919 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $624	Free Cancellation	Rating 8.2 486 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $670	Free Cancellation	Rating 8.4 1,148 reviews	Search Korean Air flights
ANA	PriceFrom $709	Free Cancellation	Rating 8.4 984 reviews	Search ANA flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,023 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $739	Free Cancellation	Rating 8.9 219 reviews	Search STARLUX Airlines flights
China Airlines	PriceFrom $743	Free Cancellation	Rating 8.3 768 reviews	Search China Airlines flights
China Eastern	PriceFrom $754	Free Cancellation	Rating 7.2 168 reviews	Search China Eastern flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Bangkok?

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

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

Yes. momondo allows you to filter the results for Washington to Bangkok flights to just show those with flexible booking policies.

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

Once all potential Washington to Bangkok flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Washington to Bangkok flights. All you need is a valid email address and we will do the rest; it is that quick and easy.