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Cheap flights from Seattle 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 Seattle 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.
1 adult
0 bags

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Find the cheapest flights from Seattle to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
12:00 pm - 7:10 am
BKK
-
SEA
34h 10m1 stop
$660Singapore Airlines
Sun, Feb 1 - Wed, Feb 11
Korean Air Logo
7:10 am - 11:20 pm
SEA
-
BKK
25h 10m2 stops
Korean Air Logo
2:05 am - 4:58 pm
BKK
-
SEA
29h 53m2 stops
$661Korean Air
Thu, Feb 12 - Sun, Feb 22
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
11:50 am - 8:10 am
BKK
-
SEA
34h 20m1 stop
$662Singapore Airlines
Fri, Mar 6 - Fri, Mar 13
Philippine Airlines Logo
9:30 pm - 12:00 pm
SEA
-
BKK
23h 30m1 stop
Philippine Airlines Logo
1:25 pm - 8:05 pm
BKK
-
SEA
20h 40m1 stop
$665Philippine Airlines
Sun, Feb 22 - Tue, Apr 28
Multiple Airlines Logo
8:45 am - 2:35 pm
SEA
-
BKK
38h 50m1 stop
Multiple Airlines Logo
8:00 pm - 1:55 pm
BKK
-
SEA
31h 55m2 stops
$667Multiple Airlines
Sun, Mar 1 - Tue, Mar 10
Hainan Airlines Logo
10:05 am - 10:05 am
SEA
-
BKK
33h 00m2 stops
Hainan Airlines Logo
4:20 pm - 9:00 am
BKK
-
SEA
30h 40m1 stop
$671Hainan Airlines
Thu, Mar 5 - Fri, Mar 20
Hainan Airlines Logo
10:00 am - 11:25 pm
SEA
-
BKK
22h 25m1 stop
Hainan Airlines Logo
1:05 am - 8:00 am
BKK
-
SEA
21h 55m1 stop
$676Hainan Airlines
Sat, Jan 31 - Fri, Feb 13
Korean Air Logo
11:00 am - 11:20 pm
SEA
-
BKK
21h 20m1 stop
Korean Air Logo
9:30 pm - 9:00 am
BKK
-
SEA
26h 30m1 stop
$677Korean Air
Sun, Feb 1 - Sun, Feb 8
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
9:10 pm - 7:10 am
BKK
-
SEA
25h 00m1 stop
$681Singapore Airlines
Sat, Jan 31 - Fri, Feb 6
Philippine Airlines Logo
9:30 pm - 5:50 pm
SEA
-
BKK
29h 20m1 stop
Philippine Airlines Logo
11:40 pm - 8:05 pm
BKK
-
SEA
34h 25m1 stop
$682Philippine Airlines
Thu, Feb 19 - Wed, Apr 29

Singapore Airlines flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Singapore Airlines deals on Seattle 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 Seattle to Bangkok Suvarnabhumi Airport

Our best Philippine Airlines deals on Seattle 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

 
Customize your flight search to find flights from Seattle 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 December 18, 2025.
Use the filters below to find and compare flights from Seattle 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

Fri 3/6

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Fri 3/13

11:50 am-8:10 am

1 stop34h 20m

$662

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

Sun 2/1

11:00 am-11:20 pm

1 stop21h 20m

Bangkok Suvarnabhumi

Sun 2/8

9:30 pm-9:00 am

1 stop26h 30m

$677

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/31

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Fri 2/6

9:10 pm-7:10 am

1 stop25h 00m

$681

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

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 Seattle 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 typical price of a round-trip flight between Seattle and Bangkok Suvarnabhumi Airport?

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 Seattle, 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 Seattle 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 Seattle 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 Seattle 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 Seattle 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 Seattle for as low as $750 on momondo.

How have Seattle to Bangkok Suvarnabhumi Airport flight prices changed over time?

As of December 2025, prices for Seattle to Bangkok Suvarnabhumi Airport flights are approximately 44% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Bangkok Suvarnabhumi Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Bangkok Suvarnabhumi Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Bangkok Suvarnabhumi Airport (SEA to BKK) flight deals and tips

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

Fastest flight time

20h 05m

Direct flights

None
The fastest flight from Seattle to Bangkok Suvarnabhumi Airport takes 20h 05m
There are no direct flights from Seattle to Bangkok Suvarnabhumi Airport. There are no popular flight routes from Seattle to Bangkok Suvarnabhumi Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to Bangkok Suvarnabhumi by plane?

    The straight-line distance from Seattle/Tacoma Intl to Bangkok Suvarnabhumi is 7433.8 mi. 20h 05m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Bangkok Suvarnabhumi Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Bangkok Suvarnabhumi Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Bangkok Suvarnabhumi Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Bangkok Suvarnabhumi Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Bangkok Suvarnabhumi Airport.

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

    The travel and health documents required for your trip to Bangkok Suvarnabhumi Airport 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 Suvarnabhumi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Bangkok Suvarnabhumi Airport?

Best airlines flying from Seattle to Bangkok Suvarnabhumi Airport

Compare and see reviews for airlines that fly from Seattle to Bangkok Suvarnabhumi Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $433Free CancellationRating
7.9
8,005 reviews
Search Delta flights
Singapore AirlinesPriceFrom $518Free CancellationRating
8.1
1,413 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $605Free CancellationRating
7.3
943 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $611Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $685Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
ANAPriceFrom $694Free CancellationRating
8.4
1,030 reviews
Search ANA flights
China AirlinesPriceFrom $734Free CancellationRating
8.3
792 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
245 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $753Free CancellationRating
7.4
9,092 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
Ko Lan
Chonburi
Ayutthaya
Pak Chong
Sattahip
Phetchaburi

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Bangkok. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Seattle to Bangkok flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bangkok from Seattle.

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

Of course. momondo tracks the price of Seattle 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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