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Cheap flights from Washington to Bangkok from $344

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 5/12. 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
10:15 am - 8:00 pm
SEA
-
BKK
19h 45m
1 stop
Singapore Airlines Logo
3:25 pm - 8:45 am
BKK
-
SEA
31h 20m
1 stop
$635Singapore Airlines
Tue, Sep 8 - Wed, Sep 16
Korean Air Logo
12:50 pm - 1:35 pm
SEA
-
BKK
34h 45m
1 stop
Korean Air Logo
9:40 pm - 10:40 am
BKK
-
SEA
27h 00m
1 stop
$637Korean Air
Sun, May 3 - Wed, May 13
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m
1 stop
$653Asiana Airlines
Thu, Apr 30 - Sun, May 17
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
11:45 am - 2:55 pm
BKK
-
SEA
17h 10m
1 stop
$657Asiana Airlines
Sun, Apr 19 - Tue, Jun 2
Multiple Airlines Logo
2:30 pm - 12:10 pm
PDX
-
BKK
31h 40m
2 stops
Multiple Airlines Logo
2:40 am - 10:25 am
BKK
-
PDX
45h 45m
2 stops
$843Multiple Airlines
Mon, Aug 31 - Fri, Sep 4
Multiple Airlines Logo
7:00 am - 9:45 am
PDX
-
BKK
36h 45m
2 stops
Multiple Airlines Logo
2:40 am - 10:25 am
BKK
-
PDX
45h 45m
2 stops
$850Multiple Airlines
Tue, Sep 1 - Fri, Sep 4
China Airlines Logo
6:07 pm - 12:10 pm
GEG
-
BKK
28h 03m
2 stops
China Airlines Logo
2:40 am - 10:57 pm
BKK
-
GEG
34h 17m
2 stops
$896China Airlines
Mon, Sep 14 - Sun, Sep 27
China Airlines Logo
7:09 am - 12:10 pm
GEG
-
BKK
39h 01m
2 stops
China Airlines Logo
10:50 am - 12:40 pm
BKK
-
GEG
39h 50m
2 stops
$936China Airlines
Mon, May 4 - Mon, May 11
STARLUX Airlines Logo
7:44 pm - 12:00 pm
GEG
-
BKK
26h 16m
2 stops
STARLUX Airlines Logo
5:50 pm - 9:11 pm
BKK
-
GEG
41h 21m
2 stops
$992STARLUX Airlines
Tue, Sep 15 - Sun, Sep 27
STARLUX Airlines Logo
7:30 pm - 4:40 pm
PSC
-
BKK
31h 10m
2 stops
STARLUX Airlines Logo
5:50 pm - 11:04 am
BKK
-
PSC
55h 14m
2 stops
$1,216STARLUX Airlines
Fri, May 8 - Fri, May 15

Korean Air flights from State of Washington to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on State of Washington to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
May 3
SEA12:50 pmSeattle/Tacoma Intl
34h 45m
1 stop
BKK1:35 pmBangkok Suvarnabhumi
May 13
BKK9:40 pmBangkok Suvarnabhumi
27h 00m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$637
Korean Air
May 3
SEA12:50 pmSeattle/Tacoma Intl
34h 45m
1 stop
BKK1:35 pmBangkok Suvarnabhumi
May 16
BKK9:50 amBangkok Suvarnabhumi
38h 50m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$688
Korean Air
Sep 3
SEA7:20 amSeattle/Tacoma Intl
27h 45m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Sep 16
BKK2:35 amBangkok Suvarnabhumi
22h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$689

Asiana Airlines flights from State of Washington to Bangkok Suvarnabhumi Airport

Our best Asiana Airlines deals on State of Washington to Bangkok Suvarnabhumi Airport flight tickets
Asiana Airlines
Apr 30
SEA12:55 amSeattle/Tacoma Intl
32h 25m
1 stop
BKK11:20 pmBangkok Suvarnabhumi
May 17
BKK1:20 amBangkok Suvarnabhumi
27h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$653
Asiana Airlines
Apr 19
SEA12:55 amSeattle/Tacoma Intl
32h 25m
1 stop
BKK11:20 pmBangkok Suvarnabhumi
May 31
BKK11:45 amBangkok Suvarnabhumi
17h 10m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$657
Asiana Airlines
Apr 26
SEA12:55 amSeattle/Tacoma Intl
19h 45m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Jun 21
BKK1:20 amBangkok Suvarnabhumi
27h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$664

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 March 25, 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 - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/8

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Wed 9/16

3:25 pm-8:45 am

1 stop31h 20m

$635

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 5/3

12:50 pm-1:35 pm

1 stop34h 45m

Bangkok Suvarnabhumi

Wed 5/13

9:40 pm-10:40 am

1 stop27h 00m

$637

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/30

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Sun 5/17

1:20 am-2:55 pm

1 stop27h 35m

$653
Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/19

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Tue 6/2

11:45 am-2:55 pm

1 stop17h 10m

$657

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Mon 8/31

2:30 pm-12:10 pm

2 stops31h 40m

Bangkok Suvarnabhumi

Fri 9/4

2:40 am-10:25 am

2 stops45h 45m

$843

PortlandBangkok

PDX - BKK

PDXBKK

Portland

Tue 9/1

7:00 am-9:45 am

2 stops36h 45m

Bangkok Suvarnabhumi

Fri 9/4

2:40 am-10:25 am

2 stops45h 45m

$850

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 9/14

6:07 pm-12:10 pm

2 stops28h 03m

Bangkok Suvarnabhumi

Sun 9/27

2:40 am-10:57 pm

2 stops34h 17m

$896

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Mon 5/4

7:09 am-12:10 pm

2 stops39h 01m

Bangkok Suvarnabhumi

Mon 5/11

10:50 am-12:40 pm

2 stops39h 50m

$936

SpokaneBangkok

GEG - BKK

GEGBKK

Spokane

Tue 9/15

7:44 pm-12:00 pm

2 stops26h 16m

Bangkok Suvarnabhumi

Sun 9/27

5:50 pm-9:11 pm

2 stops41h 21m

$992

PascoBangkok

PSC - BKK

PSCBKK

Pasco Tri Cities

Fri 5/8

7:30 pm-4:40 pm

2 stops31h 10m

Bangkok Suvarnabhumi

Fri 5/15

5:50 pm-11:04 am

2 stops55h 14m

$1,216

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 September is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from State of Washington, with most prices found around $739. The month of February is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from State of Washington averaging around $751.

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 $866 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 $728 on momondo.

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

You could potentially save up to 28% 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

18h 55m

Direct flights

None
The fastest flight from State of Washington to Bangkok Suvarnabhumi Airport takes 18h 55m
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?

  • 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 $154Free CancellationRating
7.3
972 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $511Free CancellationRating
8.2
1,484 reviews
Search Singapore Airlines flights
Air CanadaPriceFrom $623Free CancellationRating
7.1
10,840 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $627Free CancellationRating
8.1
506 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $659Free CancellationRating
8.4
1,202 reviews
Search Korean Air flights
ANAPriceFrom $680Free CancellationRating
8.4
1,141 reviews
Search ANA flights
DeltaPriceFrom $694Free CancellationRating
7.9
8,326 reviews
Search Delta flights
United AirlinesPriceFrom $700Free CancellationRating
7.4
9,479 reviews
Search United Airlines flights
Cathay PacificPriceFrom $704Free CancellationRating
7.6
1,231 reviews
Search Cathay Pacific flights
China AirlinesPriceFrom $717Free CancellationRating
8.3
817 reviews
Search China 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
Ko Lan
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.

An easier way to manage your Bangkok Suvarnabhumi Airport trip

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