What airlines fly to Bangkok?

EVA Air, Asiana Airlines and China 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 29% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 16 different airlines that fly to Bangkok on a routine basis, so you have a few additional options to choose from.

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

Japan Airlines, Philippine Airlines, and United Airlines are the most popular carriers operating from Washington to Bangkok

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 05m on average. Another popular route from State of Washington to Bangkok is flying from Spokane to Bangkok Suvarnabhumi Airport, which will take roughly 23h 23m. 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 17 operators available for flights from Washington to Bangkok as of December 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.

$354 Cheap Flights from Washington to Bangkok in 2025/26

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Find the cheapest flights from Washington to Bangkok

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:45 am - 6:45 pm

SEA

BKK

43h 00m1 stop

8:00 pm - 1:55 pm

BKK

SEA

31h 55m2 stops

$666Multiple Airlines

Sun, Mar 1 - Tue, Mar 10

10:05 am - 10:40 am

SEA

BKK

33h 35m1 stop

11:50 am - 8:05 am

BKK

SEA

35h 15m1 stop

$680Hainan Airlines

Thu, Jan 22 - Wed, Feb 4

8:45 am - 8:00 pm

SEA

BKK

20h 15m1 stop

9:10 pm - 7:10 am

BKK

SEA

25h 00m1 stop

$681Singapore Airlines

Fri, Jan 30 - Mon, Feb 9

9:30 pm - 11:00 pm

SEA

BKK

34h 30m1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m1 stop

$682Philippine Airlines

Thu, Feb 26 - Tue, Mar 31

8:45 am - 2:35 pm

SEA

BKK

38h 50m1 stop

3:30 pm - 10:56 am

BKK

SEA

33h 26m2 stops

$683Multiple Airlines

Sun, Mar 1 - Tue, Mar 31

10:05 am - 6:05 pm

SEA

BKK

41h 00m2 stops

1:05 am - 8:00 am

BKK

SEA

21h 55m1 stop

$685Hainan Airlines

Thu, Jan 22 - Fri, Mar 6

12:10 am - 9:50 am

SEA

BKK

18h 40m1 stop

5:50 pm - 6:10 pm

BKK

SEA

15h 20m1 stop

$692China Airlines

Tue, Jan 13 - Mon, Feb 2

12:10 am - 11:15 am

SEA

BKK

21h 05m1 stop

12:20 pm - 2:55 pm

BKK

SEA

16h 35m1 stop

$696Asiana Airlines

Mon, Mar 9 - Tue, Mar 31

9:19 pm - 8:00 pm

PDX

BKK

31h 41m2 stops

12:00 pm - 8:35 am

BKK

PDX

35h 35m2 stops

$786Singapore Airlines

Wed, Feb 25 - Sun, Mar 8

5:35 pm - 9:50 am

PDX

BKK

25h 15m2 stops

5:50 pm - 10:46 pm

BKK

PDX

19h 56m2 stops

$828China Airlines

Sun, Jan 18 - Thu, Feb 5

Philippine Airlines flights from State of Washington to Bangkok

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

Philippine Airlines

Feb 26

SEA9:30 pmSeattle/Tacoma Intl

34h 30m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$682

Find similar

Philippine Airlines

Feb 27

SEA9:30 pmSeattle/Tacoma Intl

23h 30m

1 stop

BKK12:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$702

Find similar

Philippine Airlines

Feb 27

SEA9:30 pmSeattle/Tacoma Intl

34h 30m

1 stop

BKK11:00 pmBangkok Suvarnabhumi

Mar 31

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$704

Find similar

United Airlines flights from State of Washington to Bangkok

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

United Airlines

Mar 3

SEA3:45 pmSeattle/Tacoma Intl

22h 25m

1 stop

BKK5:10 amBangkok Suvarnabhumi

Mar 29

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$701

Find similar

United Airlines

May 6

SEA7:37 pmSeattle/Tacoma Intl

42h 58m

2 stops

BKK4:35 amBangkok Suvarnabhumi

May 13

BKK9:35 amBangkok Suvarnabhumi

18h 50m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$705

Find similar

United Airlines

May 7

SEA4:30 pmSeattle/Tacoma Intl

22h 05m

1 stop

BKK4:35 amBangkok Suvarnabhumi

May 19

BKK9:35 amBangkok Suvarnabhumi

46h 59m

2 stops

SEA6:34 pmSeattle/Tacoma Intl

$711

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

Tue 3/10

8:00 pm-1:55 pm

2 stops31h 55m

$666

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/22

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 2/4

11:50 am-8:05 am

1 stop35h 15m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/30

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 2/9

9:10 pm-7:10 am

1 stop25h 00m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/26

9:30 pm-11:00 pm

1 stop34h 30m

Bangkok Suvarnabhumi

Tue 3/31

1:25 pm-8:05 pm

1 stop20h 40m

$682

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Tue 3/31

3:30 pm-10:56 am

2 stops33h 26m

$683

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/22

10:05 am-6:05 pm

2 stops41h 00m

Bangkok Suvarnabhumi

Fri 3/6

1:05 am-8:00 am

1 stop21h 55m

$685

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

12:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

Mon 2/2

5:50 pm-6:10 pm

1 stop15h 20m

$692

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/9

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Tue 3/31

12:20 pm-2:55 pm

1 stop16h 35m

$696

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Wed 2/25

9:19 pm-8:00 pm

2 stops31h 41m

Bangkok Suvarnabhumi

Sun 3/8

12:00 pm-8:35 am

2 stops35h 35m

$786

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Sun 1/18

5:35 pm-9:50 am

2 stops25h 15m

Bangkok Suvarnabhumi

Thu 2/5

5:50 pm-10:46 pm

2 stops19h 56m

$828

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 $759.

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 $894 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 $750 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

Fastest flight time	20h 05m
Direct flights	None

The fastest flight from State of Washington to Bangkok takes 20h 05m

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 17 operators available for flights from Washington to Bangkok as of December 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 8,007 reviews	Search Delta flights
Singapore Airlines	PriceFrom $520	Free Cancellation	Rating 8.1 1,412 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $605	Free Cancellation	Rating 7.3 941 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $612	Free Cancellation	Rating 8.2 492 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $679	Free Cancellation	Rating 8.4 1,184 reviews	Search Korean Air flights
ANA	PriceFrom $695	Free Cancellation	Rating 8.4 1,021 reviews	Search ANA flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,095 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $736	Free Cancellation	Rating 8.2 788 reviews	Search China Airlines flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 243 reviews	Search STARLUX Airlines flights
United Airlines	PriceFrom $753	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines 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.