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Cheap flights from Washington to Bangkok from $398

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 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 5:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
41h 15m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:10 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 30m1 stop Singapore Changi
$661Singapore Airlines
Tue, Nov 3 - Tue, Nov 17
Singapore Airlines Logo
8:45 am - 5:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
41h 15m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:10 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 30m1 stop Singapore Changi
$665Singapore Airlines
Tue, Nov 3 - Sat, Nov 14
Air Canada Logo
3:00 pm - 5:05 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
24h 05m1 stop Vancouver Intl
Air Canada Logo
7:05 am - 2:22 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
21h 17m1 stop Vancouver Intl
$741Air Canada
Mon, Sep 7 - Mon, Sep 21
Asiana Airlines Logo
12:10 am - 11:15 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
20h 05m1 stop Incheon Intl
Asiana Airlines Logo
12:20 pm - 1:55 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
16h 35m1 stop Incheon Intl
$752Asiana Airlines
Thu, Nov 5 - Sun, Nov 22
Air Canada Logo
10:40 am - 5:05 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
28h 25m1 stop Vancouver Intl
Air Canada Logo
7:05 am - 2:22 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
21h 17m1 stop Vancouver Intl
$753Air Canada
Wed, Sep 2 - Wed, Sep 30
Multiple Airlines Logo
10:40 am - 5:05 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
28h 25m1 stop Vancouver Intl
Multiple Airlines Logo
3:45 pm - 2:22 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 37m2 stops Hong Kong Intl Vancouver Intl
$775Multiple Airlines
Mon, Sep 7 - Mon, Sep 21
Asiana Airlines Logo
12:10 am - 10:40 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
20h 30m1 stop Incheon Intl
Asiana Airlines Logo
1:35 am - 3:15 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
27h 40m1 stop Incheon Intl
$776Asiana Airlines
Tue, Sep 8 - Mon, Sep 14
Multiple Airlines Logo
10:30 am - 11:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
22h 30m2 stops Calgary Tokyo Narita
Multiple Airlines Logo
11:45 am - 12:23 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
38h 38m2 stops Incheon Intl San Francisco
$777Multiple Airlines
Wed, Sep 2 - Wed, Sep 23
Hainan Airlines Logo
11:00 am - 12:20 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
35h 20m1 stop Beijing Capital
Hainan Airlines Logo
12:25 am - 9:00 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
22h 35m1 stop Beijing Capital
$810Hainan Airlines
Sat, Sep 5 - Fri, Sep 11
Hainan Airlines Logo
11:00 am - 11:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
22h 00m1 stop Beijing Capital
Hainan Airlines Logo
12:25 am - 9:00 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
22h 35m1 stop Beijing Capital
$826Hainan Airlines
Sat, Aug 29 - Fri, Sep 11

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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
Singapore Airlines
Nov 3
SEA8:45 amSeattle/Tacoma Intl
41h 15m
1 stop
BKK5:00 pmBangkok Suvarnabhumi
Nov 17
BKK9:40 amBangkok Suvarnabhumi
36h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$661
Singapore Airlines
Nov 3
SEA8:45 amSeattle/Tacoma Intl
41h 15m
1 stop
BKK5:00 pmBangkok Suvarnabhumi
Nov 14
BKK9:40 amBangkok Suvarnabhumi
36h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$665
Singapore Airlines
Oct 29
SEA9:45 amSeattle/Tacoma Intl
38h 50m
1 stop
BKK2:35 pmBangkok Suvarnabhumi
Nov 13
BKK9:40 amBangkok Suvarnabhumi
36h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$667

United Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

Our best United Airlines deals on State of Washington to Bangkok Suvarnabhumi Airport flight tickets
United Airlines
Aug 12
SEA6:52 pmSeattle/Tacoma Intl
24h 43m
2 stops
BKK9:35 amBangkok Suvarnabhumi
Aug 25
BKK9:35 amBangkok Suvarnabhumi
18h 50m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$877
United Airlines
Aug 19
SEA4:30 pmSeattle/Tacoma Intl
22h 05m
1 stop
BKK4:35 amBangkok Suvarnabhumi
Sep 1
BKK9:35 amBangkok Suvarnabhumi
46h 54m
2 stops
SEA6:29 pmSeattle/Tacoma Intl
$883
United Airlines
Aug 20
SEA4:30 pmSeattle/Tacoma Intl
22h 05m
1 stop
BKK4:35 amBangkok Suvarnabhumi
Aug 31
BKK3:45 pmBangkok Suvarnabhumi
33h 40m
3 stops
SEA11:25 amSeattle/Tacoma Intl
$892

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Bangkok Suvarnabhumi Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 11, 2026.
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

Cheapest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/3

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Tue 11/17

9:40 am-7:10 am

1 stop36h 30m

$661

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/3

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Sat 11/14

9:40 am-7:10 am

1 stop36h 30m

$665

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/7

3:00 pm-5:05 am

1 stop24h 05m

Bangkok Suvarnabhumi

Mon 9/21

7:05 am-2:22 pm

1 stop21h 17m

$741
Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/5

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Sun 11/22

12:20 pm-1:55 pm

1 stop16h 35m

$752

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 9/2

10:40 am-5:05 am

1 stop28h 25m

Bangkok Suvarnabhumi

Wed 9/30

7:05 am-2:22 pm

1 stop21h 17m

$753

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/7

10:40 am-5:05 am

1 stop28h 25m

Bangkok Suvarnabhumi

Mon 9/21

3:45 pm-2:22 pm

2 stops36h 37m

$775

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 9/8

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Mon 9/14

1:35 am-3:15 pm

1 stop27h 40m

$776

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 9/2

10:30 am-11:00 pm

2 stops22h 30m

Bangkok Suvarnabhumi

Wed 9/23

11:45 am-12:23 pm

2 stops38h 38m

$777

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sat 9/5

11:00 am-12:20 pm

1 stop35h 20m

Bangkok Suvarnabhumi

Fri 9/11

12:25 am-9:00 am

1 stop22h 35m

$810

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sat 8/29

11:00 am-11:00 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Fri 9/11

12:25 am-9:00 am

1 stop22h 35m

$826

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Bangkok from

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

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

The month of March is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from State of Washington, with most prices found around $748. The month of October is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from State of Washington averaging around $757.

How far in advance should I book a flight from Washington 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 $740 on momondo.

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

You could potentially save up to 16% 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

20h 15m

Direct flights

None
The fastest flight from State of Washington to Bangkok Suvarnabhumi Airport takes 20h 15m
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

Frequently asked questions about flying from Washington to Bangkok Suvarnabhumi Airport

  • 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?

  • 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
Philippine AirlinesPriceFrom $149Free CancellationRating
7.3
1,014 reviews
Search Philippine Airlines flights
Hainan AirlinesPriceFrom $385Free CancellationRating
8.3
68 reviews
Search Hainan Airlines flights
Singapore AirlinesPriceFrom $510Free CancellationRating
8.2
1,584 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $577Free CancellationRating
7.4
3,740 reviews
Search Qatar Airways flights
Asiana AirlinesPriceFrom $623Free CancellationRating
8.1
556 reviews
Search Asiana Airlines flights
Air CanadaPriceFrom $623Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights
Korean AirPriceFrom $652Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
ANAPriceFrom $690Free CancellationRating
8.3
1,294 reviews
Search ANA flights
DeltaPriceFrom $694Free CancellationRating
7.8
8,505 reviews
Search Delta flights
United AirlinesPriceFrom $702Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights

Traveling to a place near Bangkok?

Book flights to Bangkok if you plan to visit one of these locations
Pattaya
Ko Samet
Kanchanaburi
Cha-am
Chonburi
Sattahip
Ayutthaya
Ko Lan
Pak Chong
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.

An easier way to manage your Bangkok Suvarnabhumi Airport trip

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