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 19h 45m on average. Another popular route from State of Washington to Bangkok is flying from Bellingham to Bangkok Suvarnabhumi Airport, which will take roughly 23h 35m. Keep in mind that layovers or delays could extend your travel time.

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

Hainan Airlines, Philippine Airlines, and China Eastern are the most popular carriers operating from Washington to Bangkok

What airlines fly to Bangkok?

EVA Air, Singapore 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 29% 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.

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 November 2026.

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.

$422 Cheap Flights from Washington to Bangkok in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

11:55 pm - 12:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 10m1 stop Manila Ninoy Aquino Intl

10:50 pm - 7:35 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 45m1 stop Manila Ninoy Aquino Intl

$762Philippine Airlines

Thu, Apr 29 - Tue, Jun 1

10:15 am - 5:15 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 00m1 stop Singapore Changi

9:20 am - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

37h 25m1 stop Singapore Changi

$762Singapore Airlines

Sat, Apr 10 - Sat, Apr 17

9:30 pm - 8:55 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 25m1 stop Manila Ninoy Aquino Intl

1:10 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

20h 35m1 stop Manila Ninoy Aquino Intl

$763Philippine Airlines

Mon, Mar 1 - Thu, Mar 11

10:15 am - 5:15 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

41h 00m1 stop Singapore Changi

9:20 am - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

37h 25m1 stop Singapore Changi

$763Singapore Airlines

Sat, Apr 3 - Fri, Apr 16

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

1:05 am - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

22h 15m1 stop Beijing Capital

$792Hainan Airlines

Thu, Jan 14 - Mon, Jan 25

10:20 am - 2:20 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

37h 00m1 stop Beijing Capital

11:10 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 55m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$792Hainan Airlines

Tue, Jan 19 - Wed, Jan 27

8:40 am - 12:10 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

36h 30m1 stop Singapore Changi

7:30 pm - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 35m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$802Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

8:40 am - 8:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

20h 20m1 stop Singapore Changi

11:50 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 15m1 stop Chongqing Jiangbei Intl

$803Multiple Airlines

Tue, Feb 23 - Wed, Mar 10

10:25 am - 12:15 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

22h 50m1 stop Hong Kong Intl

7:15 pm - 9:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

28h 30m1 stop Hong Kong Intl

$874Cathay Pacific

Mon, Mar 1 - Mon, Mar 15

10:25 am - 2:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

36h 40m1 stop Hong Kong Intl

3:10 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

32h 35m1 stop Hong Kong Intl

$880Cathay Pacific

Mon, Feb 8 - Mon, Feb 15

Cheap last minute flights

Enter your travel dates to find the best prices.

8:40 am - 6:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

43h 05m1 stop Singapore Changi

12:00 pm - 7:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Singapore Changi

$766Singapore Airlines

Sun, Nov 15 - Thu, Dec 10

8:40 am - 6:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

43h 05m1 stop Singapore Changi

12:00 pm - 7:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Singapore Changi

$766Singapore Airlines

Sun, Nov 15 - Fri, Dec 11

9:30 pm - 6:45 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

30h 15m1 stop Manila Ninoy Aquino Intl

1:10 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

20h 35m1 stop Manila Ninoy Aquino Intl

$791Philippine Airlines

Mon, Nov 16 - Wed, Dec 2

9:30 pm - 5:35 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

29h 05m1 stop Manila Ninoy Aquino Intl

11:40 pm - 6:45 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

34h 05m1 stop Manila Ninoy Aquino Intl

$791Philippine Airlines

Sun, Nov 15 - Tue, Dec 1

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

4:20 pm - 8:20 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

31h 00m1 stop Beijing Capital

$792Hainan Airlines

Thu, Nov 12 - Mon, Nov 30

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

11:50 am - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

35h 15m1 stop Chongqing Jiangbei Intl

$792Hainan Airlines

Thu, Nov 12 - Wed, Nov 25

10:25 am - 12:00 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

34h 35m1 stop Hong Kong Intl

7:30 pm - 8:05 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

27h 35m2 stops Haikou Meilan Intl Chongqing Jiangbei Intl

$908Multiple Airlines

Mon, Nov 16 - Wed, Dec 2

10:05 am - 10:40 amSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

33h 35m1 stop Chongqing Jiangbei Intl

2:35 am - 6:10 pmBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

30h 35m1 stop Taipei City Taiwan Taoyuan Intl

$913Multiple Airlines

Thu, Nov 12 - Sat, Nov 21

10:25 am - 6:05 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

40h 40m1 stop Hong Kong Intl

5:45 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

30h 00m1 stop Hong Kong Intl

$926Cathay Pacific

Tue, Nov 17 - Tue, Dec 15

10:25 am - 4:40 pmSEA Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi

39h 15m1 stop Hong Kong Intl

3:10 pm - 8:45 amBKK Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl

32h 35m1 stop Hong Kong Intl

$926Cathay Pacific

Tue, Nov 17 - Tue, Dec 8

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Hainan Airlines flights from State of Washington to Bangkok

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

Hainan Airlines

Jan 21

SEA10:05 amSeattle/Tacoma Intl

33h 00m

2 stops

BKK10:05 amBangkok Suvarnabhumi

Feb 3

BKK11:50 amBangkok Suvarnabhumi

35h 15m

1 stop

SEA8:05 amSeattle/Tacoma Intl

$792

Hainan Airlines

Nov 28

SEA10:20 amSeattle/Tacoma Intl

22h 15m

1 stop

BKK11:35 pmBangkok Suvarnabhumi

Dec 14

BKK1:05 amBangkok Suvarnabhumi

22h 15m

1 stop

SEA8:20 amSeattle/Tacoma Intl

$793

Hainan Airlines

Nov 26

SEA10:05 amSeattle/Tacoma Intl

33h 35m

1 stop

BKK10:40 amBangkok Suvarnabhumi

Nov 30

BKK4:20 pmBangkok Suvarnabhumi

31h 00m

1 stop

SEA8:20 amSeattle/Tacoma Intl

$815

China Eastern flights from State of Washington to Bangkok

Our best China Eastern deals on State of Washington to Bangkok flight tickets

China Eastern

Apr 4

GEG6:30 amSpokane

28h 10m

2 stops

BKK12:40 amBangkok Suvarnabhumi

Apr 18

BKK2:10 amBangkok Suvarnabhumi

33h 27m

2 stops

GEG9:37 pmSpokane

$1,002

China Eastern

Apr 4

GEG6:30 amSpokane

28h 10m

2 stops

BKK12:40 amBangkok Suvarnabhumi

Apr 18

BKK2:10 amBangkok Suvarnabhumi

33h 27m

2 stops

GEG9:37 pmSpokane

$1,031

China Eastern

Nov 15

GEG7:00 amSpokane

26h 55m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Dec 13

BKK1:55 amBangkok Suvarnabhumi

28h 52m

2 stops

GEG3:47 pmSpokane

$1,048

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 4/29

11:55 pm-12:05 pm

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 6/1

10:50 pm-7:35 pm

1 stop34h 45m

$762

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sat 4/10

10:15 am-5:15 pm

1 stop41h 00m

Bangkok Suvarnabhumi

Sat 4/17

9:20 am-8:45 am

1 stop37h 25m

$762

Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 3/1

9:30 pm-8:55 am

1 stop20h 25m

Bangkok Suvarnabhumi

Thu 3/11

1:10 pm-6:45 pm

1 stop20h 35m

$763

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sat 4/3

10:15 am-5:15 pm

1 stop41h 00m

Bangkok Suvarnabhumi

Fri 4/16

9:20 am-8:45 am

1 stop37h 25m

$763

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 1/14

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Mon 1/25

1:05 am-8:20 am

1 stop22h 15m

$792

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 1/19

10:20 am-2:20 pm

1 stop37h 00m

Bangkok Suvarnabhumi

Wed 1/27

11:10 am-8:05 am

2 stops35h 55m

$792

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 1/20

8:40 am-12:10 pm

1 stop36h 30m

Bangkok Suvarnabhumi

Wed 1/27

7:30 pm-8:05 am

2 stops27h 35m

$802

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 2/23

8:40 am-8:00 pm

1 stop20h 20m

Bangkok Suvarnabhumi

Wed 3/10

11:50 am-8:05 am

1 stop35h 15m

$803

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 3/1

10:25 am-12:15 am

1 stop22h 50m

Bangkok Suvarnabhumi

Mon 3/15

7:15 pm-9:45 am

1 stop28h 30m

$874

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 2/8

10:25 am-2:05 pm

1 stop36h 40m

Bangkok Suvarnabhumi

Mon 2/15

3:10 pm-8:45 am

1 stop32h 35m

$880

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 March, then book flights to Bangkok from State of Washington during April instead. Flights to Bangkok in April, while not as cheap as those in March, still average around $801.

How far in advance should I book a flight from Washington 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 $911 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 $819 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

Best Price Found	$422
Fastest flight time	19h 45m
Direct flights	None

The best one-way flight to Bangkok from State of Washington in the past 72 hours is $422. The best round-trip flight deal from State of Washington to Bangkok found on momondo in the last 72 hours is $762.

The fastest flight from State of Washington to Bangkok takes 19h 45m

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

Frequently asked questions about flying from Washington to Bangkok

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 November 2026.
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
Philippine Airlines	PriceFrom $149	Free Cancellation	Rating 7.3 1,040 reviews	Search Philippine Airlines flights
Hainan Airlines	PriceFrom $385	Free Cancellation	Rating 8.4 73 reviews	Search Hainan Airlines flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,888 reviews	Search Air Canada flights
Singapore Airlines	PriceFrom $512	Free Cancellation	Rating 8.2 1,633 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $577	Free Cancellation	Rating 7.4 3,700 reviews	Search Qatar Airways flights
Asiana Airlines	PriceFrom $633	Free Cancellation	Rating 8.1 572 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $655	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.8 8,707 reviews	Search Delta flights
ANA	PriceFrom $699	Free Cancellation	Rating 8.3 1,341 reviews	Search ANA flights
United Airlines	PriceFrom $702	Free Cancellation	Rating 7.3 10,478 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.

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Cheap flights from Washington to Bangkok from $422

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 5/10. 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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Hainan Airlines flights from State of Washington to Bangkok

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

China Eastern flights from State of Washington to Bangkok

Our best China Eastern deals on State of Washington to Bangkok flight tickets

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

What is the cheapest month to fly to Bangkok?

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

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

What airlines fly to Bangkok?

How long does it take to fly to Bangkok?

Cheap State of Washington to Bangkok flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington to Bangkok

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

Why use momondo?

An easier way to manage your Bangkok 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 Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok

Fly your favorite airline to Bangkok

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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

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According to popular flight searches on momondo this year

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