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

Delta, China Airlines, and United Airlines are the most popular carriers operating from Washington to Bangkok Suvarnabhumi

How long does it take to fly to Bangkok Suvarnabhumi Airport?

Flight times vary depending on what airport in State of Washington you fly out of and what airport in Bangkok Suvarnabhumi Airport you fly into. For example, flying from Seattle to Bangkok Suvarnabhumi Airport takes 20h 05m on average. On the other hand, flying from Spokane to Bangkok Suvarnabhumi Airport takes 23h 10m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Bangkok Suvarnabhumi Airport?

EVA Air, Asiana Airlines and China Airlines are the top three most popular airlines that fly to Bangkok Suvarnabhumi Airport from State of Washington according to our data. EVA Air is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Bangkok Suvarnabhumi Airport. Keep in mind that there are 16 different airlines that fly to Bangkok Suvarnabhumi Airport on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Washington to Bangkok Suvarnabhumi Airport are refreshed on a daily basis.

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

As of December 2025, there are 17 operators available to choose from for flights from Washington to Bangkok Suvarnabhumi Airport.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Bangkok Suvarnabhumi Airport.

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

The travel and health documents you'll need for your trip to Bangkok Suvarnabhumi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok Suvarnabhumi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$354 Cheap Flights from State of Washington to Bangkok Suvarnabhumi Airport in 2025/26

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8:45 am - 8:00 pm

SEA

BKK

20h 15m1 stop

12:00 pm - 7:10 am

BKK

SEA

34h 10m1 stop

$660Singapore Airlines

Sun, Feb 1 - Wed, Feb 11

7:10 am - 11:20 pm

SEA

BKK

25h 10m2 stops

2:05 am - 4:58 pm

BKK

SEA

29h 53m2 stops

$661Korean Air

Thu, Feb 12 - Sun, Feb 22

9:30 pm - 12:00 pm

SEA

BKK

23h 30m1 stop

1:25 pm - 8:05 pm

BKK

SEA

20h 40m1 stop

$665Philippine Airlines

Sun, Feb 22 - Tue, Apr 28

8:45 am - 2:35 pm

SEA

BKK

38h 50m1 stop

8:00 pm - 1:55 pm

BKK

SEA

31h 55m2 stops

$667Multiple Airlines

Sun, Mar 1 - Tue, Mar 10

10:05 am - 10:05 am

SEA

BKK

33h 00m2 stops

4:20 pm - 9:00 am

BKK

SEA

30h 40m1 stop

$671Hainan Airlines

Thu, Mar 5 - Fri, Mar 20

10:00 am - 11:25 pm

SEA

BKK

22h 25m1 stop

1:05 am - 8:00 am

BKK

SEA

21h 55m1 stop

$676Hainan Airlines

Sat, Jan 31 - Fri, Feb 13

9:30 pm - 5:50 pm

SEA

BKK

29h 20m1 stop

11:40 pm - 8:05 pm

BKK

SEA

34h 25m1 stop

$682Philippine Airlines

Thu, Feb 19 - Wed, Apr 29

10:33 am - 7:50 am

PDX

BKK

30h 17m3 stops

8:50 pm - 9:42 am

BKK

PDX

51h 52m3 stops

$795Multiple Airlines

Tue, Feb 3 - Fri, Feb 20

5:00 am - 12:45 am

GEG

BKK

28h 45m2 stops

2:05 am - 10:29 pm

BKK

GEG

34h 24m2 stops

$837Delta

Wed, Mar 4 - Tue, Mar 17

5:30 am - 12:55 am

PDX

BKK

28h 25m2 stops

2:05 am - 4:56 pm

BKK

PDX

28h 51m2 stops

$857Delta

Mon, Feb 23 - Sun, Mar 15

Singapore Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

Our best Singapore Airlines deals on State of Washington to Bangkok Suvarnabhumi Airport flight tickets

Singapore Airlines

Feb 1

SEA8:45 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK8:00 pmBangkok Suvarnabhumi

Feb 11

BKK12:00 pmBangkok Suvarnabhumi

34h 10m

1 stop

SEA7:10 amSeattle/Tacoma Intl

$660

Find similar

Singapore Airlines

Mar 6

SEA8:45 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK8:00 pmBangkok Suvarnabhumi

Mar 13

BKK11:50 amBangkok Suvarnabhumi

34h 20m

1 stop

SEA8:10 amSeattle/Tacoma Intl

$662

Find similar

Singapore Airlines

Mar 24

SEA9:45 amSeattle/Tacoma Intl

38h 50m

1 stop

BKK2:35 pmBangkok Suvarnabhumi

Apr 15

BKK9:20 amBangkok Suvarnabhumi

37h 25m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$679

Find similar

Philippine Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

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

Philippine Airlines

Apr 2

SEA11:10 pmSeattle/Tacoma Intl

33h 30m

1 stop

BKK10:40 pmBangkok Suvarnabhumi

Apr 23

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$663

Find similar

Philippine Airlines

Feb 22

SEA9:30 pmSeattle/Tacoma Intl

23h 30m

1 stop

BKK12:00 pmBangkok Suvarnabhumi

Apr 28

BKK1:25 pmBangkok Suvarnabhumi

20h 40m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$665

Find similar

Philippine Airlines

Feb 19

SEA9:30 pmSeattle/Tacoma Intl

29h 20m

1 stop

BKK5:50 pmBangkok Suvarnabhumi

Apr 29

BKK11:40 pmBangkok Suvarnabhumi

34h 25m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$682

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/1

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Wed 2/11

12:00 pm-7:10 am

1 stop34h 10m

$660

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/12

7:10 am-11:20 pm

2 stops25h 10m

Bangkok Suvarnabhumi

Sun 2/22

2:05 am-4:58 pm

2 stops29h 53m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/22

9:30 pm-12:00 pm

1 stop23h 30m

Bangkok Suvarnabhumi

Tue 4/28

1:25 pm-8:05 pm

1 stop20h 40m

$665

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Tue 3/10

8:00 pm-1:55 pm

2 stops31h 55m

$667

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 3/5

10:05 am-10:05 am

2 stops33h 00m

Bangkok Suvarnabhumi

Fri 3/20

4:20 pm-9:00 am

1 stop30h 40m

$671

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/31

10:00 am-11:25 pm

1 stop22h 25m

Bangkok Suvarnabhumi

Fri 2/13

1:05 am-8:00 am

1 stop21h 55m

$676

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/19

9:30 pm-5:50 pm

1 stop29h 20m

Bangkok Suvarnabhumi

Wed 4/29

11:40 pm-8:05 pm

1 stop34h 25m

$682

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Tue 2/3

10:33 am-7:50 am

3 stops30h 17m

Bangkok Suvarnabhumi

Fri 2/20

8:50 pm-9:42 am

3 stops51h 52m

$795

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Wed 3/4

5:00 am-12:45 am

2 stops28h 45m

Bangkok Suvarnabhumi

Tue 3/17

2:05 am-10:29 pm

2 stops34h 24m

$837

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Mon 2/23

5:30 am-12:55 am

2 stops28h 25m

Bangkok Suvarnabhumi

Sun 3/15

2:05 am-4:56 pm

2 stops28h 51m

$857

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 Suvarnabhumi Airport

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 Suvarnabhumi Airport?

The month of September is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from State of Washington, with most prices found around $751. The month of February is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from State of Washington averaging around $759.

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

The cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport is on a Tuesday when prices can be found for as low as $931. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,111.

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

Our most recent data shows that the best time of day to fly to Bangkok Suvarnabhumi Airport is in the morning. Flights from State of Washington to Bangkok Suvarnabhumi Airport during this time can be as low as $986. At noon is when there is more demand to fly to Bangkok Suvarnabhumi Airport, so prices are often more expensive at around $1,081 per ticket.

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

You are more likely to see cheaper flights to Bangkok Suvarnabhumi Airport from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok Suvarnabhumi Airport for around $893 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok Suvarnabhumi Airport from State of Washington for as low as $750 on momondo.

Can stopping save me money on State of Washington to Bangkok Suvarnabhumi Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a State of Washington to Bangkok Suvarnabhumi Airport flight.

Cheap State of Washington to Bangkok Suvarnabhumi Airport flight deals and tips

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

Fastest flight time	19h 30m
Direct flights	None

The fastest flight from State of Washington to Bangkok Suvarnabhumi Airport takes 19h 30m

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

Search flight deals

When did momondo last update prices for flights from Washington to Bangkok Suvarnabhumi Airport?
Prices for flights from Washington to Bangkok Suvarnabhumi Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Bangkok Suvarnabhumi Airport?
As of December 2025, there are 17 operators available to choose from for flights from Washington to Bangkok Suvarnabhumi Airport.
How old do you have to be to fly from Washington to Bangkok Suvarnabhumi Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Bangkok Suvarnabhumi Airport.
What documentation or ID do you need to fly to Bangkok Suvarnabhumi Airport?
The travel and health documents you'll need for your trip to Bangkok Suvarnabhumi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok Suvarnabhumi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Bangkok Suvarnabhumi Airport

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $433	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
Singapore Airlines	PriceFrom $518	Free Cancellation	Rating 8.1 1,413 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $605	Free Cancellation	Rating 7.3 943 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $611	Free Cancellation	Rating 8.2 493 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $685	Free Cancellation	Rating 8.4 1,186 reviews	Search Korean Air flights
ANA	PriceFrom $694	Free Cancellation	Rating 8.4 1,030 reviews	Search ANA flights
China Airlines	PriceFrom $734	Free Cancellation	Rating 8.3 792 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,095 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 245 reviews	Search STARLUX Airlines flights
United Airlines	PriceFrom $753	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights

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Cha-am

Ko Lan

Chonburi

Ayutthaya

Pak Chong

Sattahip

Phetchaburi

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?

All flight searches from Washington to Bangkok on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Washington to Bangkok flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to Bangkok, momondo offers a useful price alert feature which will track prices for flights to Bangkok from Washington and alert you when they change.

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Cheap flights from Washington to Bangkok from $354

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Bangkok departing on 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Singapore Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

Our best Singapore Airlines deals on State of Washington to Bangkok Suvarnabhumi Airport flight tickets

Philippine Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

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

momondo Fare Finder

Use the filters below to find and compare flights from Washington to Bangkok Suvarnabhumi Airport that are best for you.

See travel insights to Bangkok from

How to get the cheapest flight ticket from State of Washington to Bangkok Suvarnabhumi Airport

What is the cheapest month to fly to Bangkok Suvarnabhumi Airport?

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

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

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

Can stopping save me money on State of Washington to Bangkok Suvarnabhumi Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a State of Washington to Bangkok Suvarnabhumi Airport flight.

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

Delta, China Airlines, and United Airlines are the most popular carriers operating from Washington to Bangkok Suvarnabhumi

What airlines fly to Bangkok Suvarnabhumi Airport?

How long does it take to fly to Bangkok Suvarnabhumi Airport?

Cheap State of Washington to Bangkok Suvarnabhumi Airport flight deals and tips

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

Fastest flight time

Direct flights

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

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

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

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

Best airlines flying from State of Washington to Bangkok Suvarnabhumi Airport

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

Traveling to a place near Bangkok?

Why use momondo?

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

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

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

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

An easier way to manage your Bangkok Suvarnabhumi Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bangkok

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo