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Cheap flights from Seattle to Bangkok from $369

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 12/3. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Philippine Airlines Logo
10:30 pm - 12:00 pmSEA-BKK
23h 30m1 stop
Philippine Airlines Logo
1:20 pm - 7:40 pmBKK-SEA
20h 20m1 stop
$675Philippine Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 18
Asiana Airlines Logo
12:10 am - 10:00 pmSEA-BKK
30h 50m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$676Asiana Airlines
Find Deal
Sat, Jan 24 - Sun, Feb 15
ANA Logo
3:40 pm - 6:30 amSEA-BKK
23h 50m1 stop
ANA Logo
7:10 am - 1:20 pmBKK-SEA
21h 10m1 stop
$681ANA
Find Deal
Mon, Dec 1 - Tue, Dec 9
Singapore Airlines Logo
8:45 am - 5:00 pmSEA-BKK
41h 15m1 stop
Singapore Airlines Logo
12:00 pm - 7:10 amBKK-SEA
34h 10m1 stop
$688Singapore Airlines
Find Deal
Sun, Feb 15 - Sat, Mar 7
Singapore Airlines Logo
8:45 am - 2:35 pmSEA-BKK
38h 50m1 stop
Singapore Airlines Logo
10:55 pm - 7:10 amBKK-SEA
23h 15m1 stop
$693Singapore Airlines
Find Deal
Sun, Jan 11 - Wed, Jan 21
Delta Logo
11:15 am - 12:55 amSEA-BKK
22h 40m1 stop
Delta Logo
2:05 am - 1:20 pmBKK-SEA
26h 15m1 stop
$695Delta
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Sun, Nov 30 - Tue, Dec 16
Korean Air Logo
11:00 am - 12:55 amSEA-BKK
22h 55m1 stop
Korean Air Logo
9:40 am - 9:00 amBKK-SEA
38h 20m1 stop
$698Korean Air
Find Deal
Wed, Jan 14 - Mon, Feb 2
Delta Logo
11:25 am - 12:45 amSEA-BKK
22h 20m1 stop
Delta Logo
12:55 am - 1:20 pmBKK-SEA
27h 25m1 stop
$703Delta
Find Deal
Thu, Jan 8 - Thu, Jan 29
Korean Air Logo
5:59 pm - 12:45 amSEA-BKK
39h 46m2 stops
Korean Air Logo
2:05 am - 9:00 amBKK-SEA
21h 55m1 stop
$704Korean Air
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Fri, Nov 28 - Sat, Dec 6
ANA Logo
3:40 pm - 5:10 amSEA-BKK
22h 30m1 stop
ANA Logo
7:10 am - 3:29 pmBKK-SEA
23h 19m2 stops
$716ANA
Find Deal
Mon, Dec 1 - Wed, Dec 10

Asiana Airlines flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Asiana Airlines deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Asiana Airlines
Jan 24
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Feb 15
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$676
Find similar
Asiana Airlines
Mar 15
SEA12:10 amSeattle/Tacoma Intl
21h 05m
1 stop
BKK11:15 amBangkok Suvarnabhumi
Mar 26
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$677
Find similar
Asiana Airlines
Feb 28
SEA12:10 amSeattle/Tacoma Intl
20h 05m
1 stop
BKK11:15 amBangkok Suvarnabhumi
Mar 27
BKK12:20 pmBangkok Suvarnabhumi
16h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$679
Find similar

ANA flights from Seattle to Bangkok Suvarnabhumi Airport

Our best ANA deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
ANA
Dec 1
SEA3:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Dec 9
BKK7:10 amBangkok Suvarnabhumi
21h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$681
Find similar
ANA
Nov 11
SEA3:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Dec 18
BKK9:10 amBangkok Suvarnabhumi
19h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$709
Find similar
ANA
Dec 1
SEA3:40 pmSeattle/Tacoma Intl
22h 30m
1 stop
BKK5:10 amBangkok Suvarnabhumi
Dec 10
BKK7:10 amBangkok Suvarnabhumi
23h 19m
2 stops
SEA3:29 pmSeattle/Tacoma Intl
$716
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 November 5, 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

Tue 3/10

10:30 pm-12:00 pm

1 stop23h 30m

Bangkok Suvarnabhumi

Wed 3/18

1:20 pm-7:40 pm

1 stop20h 20m

$675

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/24

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Sun 2/15

11:55 pm-1:55 pm

1 stop29h 00m

$676

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 12/1

3:40 pm-6:30 am

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 12/9

7:10 am-1:20 pm

1 stop21h 10m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/15

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Sat 3/7

12:00 pm-7:10 am

1 stop34h 10m

$688

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/11

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Wed 1/21

10:55 pm-7:10 am

1 stop23h 15m

$693

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/30

11:15 am-12:55 am

1 stop22h 40m

Bangkok Suvarnabhumi

Tue 12/16

2:05 am-1:20 pm

1 stop26h 15m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 1/14

11:00 am-12:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Mon 2/2

9:40 am-9:00 am

1 stop38h 20m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/8

11:25 am-12:45 am

1 stop22h 20m

Bangkok Suvarnabhumi

Thu 1/29

12:55 am-1:20 pm

1 stop27h 25m

$703

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 11/28

5:59 pm-12:45 am

2 stops39h 46m

Bangkok Suvarnabhumi

Sat 12/6

2:05 am-9:00 am

1 stop21h 55m

$704

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 12/1

3:40 pm-5:10 am

1 stop22h 30m

Bangkok Suvarnabhumi

Wed 12/10

7:10 am-3:29 pm

2 stops23h 19m

$716

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 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 $763.

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 $897 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 $744 on momondo.

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

As of November 2025, prices for Seattle to Bangkok Suvarnabhumi Airport flights are approximately 35% 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

Direct flights

None
There are no direct flights from Seattle to Bangkok Suvarnabhumi Airport. There are no popular flight routes from Seattle to Bangkok Suvarnabhumi Airport.
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  • 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. 19h 30m 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
8,004 reviews
Search Delta flights
Singapore AirlinesPriceFrom $525Free CancellationRating
8.1
1,391 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $609Free CancellationRating
7.3
932 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $618Free CancellationRating
8.2
484 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $670Free CancellationRating
8.4
1,160 reviews
Search Korean Air flights
ANAPriceFrom $703Free CancellationRating
8.4
1,003 reviews
Search ANA flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,053 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $739Free CancellationRating
8.9
219 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $741Free CancellationRating
8.3
777 reviews
Search China Airlines flights
China EasternPriceFrom $754Free CancellationRating
7.2
174 reviews
Search China Eastern 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
Ayutthaya
Ko Lan
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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