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

Philippine Airlines, Singapore Airlines, and ANA are the most popular carriers operating from Washington to Bangkok

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.

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 Spokane to Bangkok Suvarnabhumi Airport, which will take roughly 23h 07m. 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 February 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.

$325 Cheap Flights from Washington to Bangkok in 2026

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One-way

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12:55 am - 10:40 am

SEA

BKK

19h 45m

1 stop

11:45 am - 2:55 pm

BKK

SEA

17h 10m

1 stop

$642Asiana Airlines

Mon, Apr 27 - Tue, May 12

10:15 am - 12:20 pm

SEA

BKK

36h 05m

1 stop

3:30 pm - 9:29 am

BKK

SEA

31h 59m

2 stops

$643Multiple Airlines

Thu, Apr 16 - Sun, May 10

10:15 am - 12:20 pm

SEA

BKK

36h 05m

1 stop

8:15 pm - 8:45 am

BKK

SEA

26h 30m

1 stop

$647Singapore Airlines

Sun, Mar 29 - Mon, Apr 6

9:45 am - 8:00 pm

SEA

BKK

20h 15m

1 stop

1:35 pm - 8:45 am

BKK

SEA

33h 10m

1 stop

$654Singapore Airlines

Tue, Mar 10 - Mon, Apr 20

7:43 pm - 12:00 pm

GEG

BKK

26h 17m

2 stops

1:10 pm - 9:31 pm

BKK

GEG

22h 21m

2 stops

$814STARLUX Airlines

Tue, Apr 7 - Wed, Apr 22

7:28 pm - 12:00 pm

PUW

BKK

26h 32m

2 stops

1:10 pm - 11:59 pm

BKK

PUW

24h 49m

2 stops

$818STARLUX Airlines

Wed, Apr 22 - Wed, Apr 29

5:00 am - 12:55 am

GEG

BKK

28h 55m

2 stops

2:05 am - 10:50 pm

BKK

GEG

34h 45m

2 stops

$853Delta

Wed, Mar 4 - Tue, Mar 17

5:50 pm - 1:05 pm

PDX

BKK

29h 15m

2 stops

2:05 pm - 9:35 am

BKK

PDX

33h 30m

2 stops

$862China Airlines

Tue, Mar 10 - Tue, Mar 24

7:08 am - 1:05 pm

PDX

BKK

38h 57m

2 stops

2:40 am - 9:35 am

BKK

PDX

44h 55m

2 stops

$871China Airlines

Sun, Mar 1 - Wed, Apr 15

6:05 am - 12:55 am

GEG

BKK

27h 50m

2 stops

2:05 am - 9:06 pm

BKK

GEG

33h 01m

2 stops

$877Delta

Wed, Mar 4 - Tue, Mar 17

Singapore Airlines flights from State of Washington to Bangkok

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

Singapore Airlines

Mar 29

SEA10:15 amSeattle/Tacoma Intl

36h 05m

1 stop

BKK12:20 pmBangkok Suvarnabhumi

Apr 6

BKK8:15 pmBangkok Suvarnabhumi

26h 30m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$647

Singapore Airlines

Mar 10

SEA9:45 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK8:00 pmBangkok Suvarnabhumi

Apr 20

BKK1:35 pmBangkok Suvarnabhumi

33h 10m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$654

Singapore Airlines

Mar 24

SEA9:45 amSeattle/Tacoma Intl

20h 15m

1 stop

BKK8:00 pmBangkok Suvarnabhumi

May 14

BKK8:15 pmBangkok Suvarnabhumi

26h 30m

1 stop

SEA8:45 amSeattle/Tacoma Intl

$663

Cathay Pacific flights from State of Washington to Bangkok

Our best Cathay Pacific deals on State of Washington to Bangkok flight tickets

Cathay Pacific

Apr 13

SEA11:45 amSeattle/Tacoma Intl

33h 45m

1 stop

BKK11:30 amBangkok Suvarnabhumi

Apr 20

BKK7:35 amBangkok Suvarnabhumi

16h 30m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$700

Cathay Pacific

Apr 7

SEA11:45 amSeattle/Tacoma Intl

22h 25m

1 stop

BKK12:10 amBangkok Suvarnabhumi

Apr 20

BKK4:25 pmBangkok Suvarnabhumi

31h 40m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$704

Cathay Pacific

Apr 9

SEA11:45 amSeattle/Tacoma Intl

22h 25m

1 stop

BKK12:10 amBangkok Suvarnabhumi

Apr 20

BKK7:10 pmBangkok Suvarnabhumi

28h 55m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$705

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 4/27

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

Tue 5/12

11:45 am-2:55 pm

1 stop17h 10m

$642

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/16

10:15 am-12:20 pm

1 stop36h 05m

Bangkok Suvarnabhumi

Sun 5/10

3:30 pm-9:29 am

2 stops31h 59m

$643

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/29

10:15 am-12:20 pm

1 stop36h 05m

Bangkok Suvarnabhumi

Mon 4/6

8:15 pm-8:45 am

1 stop26h 30m

$647

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 3/10

9:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 4/20

1:35 pm-8:45 am

1 stop33h 10m

$654

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Tue 4/7

7:43 pm-12:00 pm

2 stops26h 17m

Bangkok Suvarnabhumi

Wed 4/22

1:10 pm-9:31 pm

2 stops22h 21m

$814

PullmanBangkok

PUW - BKK

PUWBKK

Pullman Moscow Regional

Wed 4/22

7:28 pm-12:00 pm

2 stops26h 32m

Bangkok Suvarnabhumi

Wed 4/29

1:10 pm-11:59 pm

2 stops24h 49m

$818

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Wed 3/4

5:00 am-12:55 am

2 stops28h 55m

Bangkok Suvarnabhumi

Tue 3/17

2:05 am-10:50 pm

2 stops34h 45m

$853

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Tue 3/10

5:50 pm-1:05 pm

2 stops29h 15m

Bangkok Suvarnabhumi

Tue 3/24

2:05 pm-9:35 am

2 stops33h 30m

$862

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Sun 3/1

7:08 am-1:05 pm

2 stops38h 57m

Bangkok Suvarnabhumi

Wed 4/15

2:40 am-9:35 am

2 stops44h 55m

$871

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Wed 3/4

6:05 am-12:55 am

2 stops27h 50m

Bangkok Suvarnabhumi

Tue 3/17

2:05 am-9:06 pm

2 stops33h 01m

$877

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 $760.

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 $876 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 $715 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	19h 45m
Direct flights	None

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

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 February 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 $154	Free Cancellation	Rating 7.2 957 reviews	Search Philippine Airlines flights
Singapore Airlines	PriceFrom $514	Free Cancellation	Rating 8.2 1,463 reviews	Search Singapore Airlines flights
Asiana Airlines	PriceFrom $626	Free Cancellation	Rating 8.1 504 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $663	Free Cancellation	Rating 8.4 1,194 reviews	Search Korean Air flights
ANA	PriceFrom $683	Free Cancellation	Rating 8.4 1,096 reviews	Search ANA flights
Delta	PriceFrom $694	Free Cancellation	Rating 7.9 8,214 reviews	Search Delta flights
United Airlines	PriceFrom $700	Free Cancellation	Rating 7.4 9,322 reviews	Search United Airlines flights
China Airlines	PriceFrom $731	Free Cancellation	Rating 8.3 804 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $735	Free Cancellation	Rating 7.6 1,171 reviews	Search Cathay Pacific flights
STARLUX Airlines	PriceFrom $740	Free Cancellation	Rating 8.9 274 reviews	Search STARLUX 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 $325

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 4/7. 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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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 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

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

Fastest flight time

Direct flights

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?

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 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

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Airports listed have a maximum distance of 15.4 mi from Bangkok

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