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Cheap flights from Seattle to Bangkok from $391

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 9/8. 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 Seattle to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
9:45 am - 2:35 pm-
38h 50m
Singapore Airlines Logo
9:35 am - 7:10 am-
36h 35m
$673Singapore Airlines
Thu, Oct 29 - Fri, Nov 13
Singapore Airlines Logo
10:15 am - 5:15 pm-
41h 00m
Singapore Airlines Logo
9:35 am - 7:10 am-
36h 35m
$683Singapore Airlines
Thu, Oct 22 - Thu, Nov 5
Air Canada Logo
10:40 am - 5:05 am-
28h 25m
Air Canada Logo
7:05 am - 10:05 am-
17h 00m
$753Air Canada
Mon, Sep 7 - Mon, Sep 28
Air Canada Logo
10:50 am - 5:05 am-
28h 15m
Air Canada Logo
7:05 am - 6:32 pm-
25h 27m
$753Air Canada
Mon, Sep 14 - Wed, Sep 23
Multiple Airlines Logo
10:40 am - 5:05 am-
28h 25m
Multiple Airlines Logo
3:45 pm - 6:32 pm-
40h 47m
$791Multiple Airlines
Wed, Sep 2 - Tue, Sep 22
Multiple Airlines Logo
5:40 pm - 12:35 pm-
28h 55m
Multiple Airlines Logo
11:45 am - 3:15 pm-
17h 30m
$798Multiple Airlines
Wed, Sep 2 - Mon, Oct 19
Korean Air Logo
12:50 pm - 11:35 pm-
20h 45m
Korean Air Logo
2:35 am - 10:40 am-
22h 05m
$809Korean Air
Tue, Sep 15 - Mon, Sep 21
Hainan Airlines Logo
11:00 am - 11:00 pm-
22h 00m
Hainan Airlines Logo
12:25 am - 9:00 am-
22h 35m
$809Hainan Airlines
Tue, Sep 1 - Mon, Sep 14
Hainan Airlines Logo
11:00 am - 11:00 pm-
22h 00m
Hainan Airlines Logo
12:20 am - 9:00 am-
22h 40m
$809Hainan Airlines
Tue, Sep 1 - Mon, Sep 14
Korean Air Logo
12:50 pm - 11:35 pm-
20h 45m
Korean Air Logo
2:35 am - 10:40 am-
22h 05m
$833Korean Air
Thu, Sep 17 - Wed, Sep 23

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Korean Air flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Aug 12
SEA1:20 pmSeattle/Tacoma Intl
20h 15m
1 stop
BKK11:35 pmBangkok Suvarnabhumi
Aug 31
BKK11:30 pmBangkok Suvarnabhumi
25h 10m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$839
Korean Air
Aug 12
SEA1:20 pmSeattle/Tacoma Intl
20h 15m
1 stop
BKK11:35 pmBangkok Suvarnabhumi
Aug 25
BKK11:30 pmBangkok Suvarnabhumi
30h 43m
2 stops
SEA4:13 pmSeattle/Tacoma Intl
$880
Korean Air
Aug 5
SEA7:20 amSeattle/Tacoma Intl
26h 15m
2 stops
BKK11:35 pmBangkok Suvarnabhumi
Aug 18
BKK9:50 amBangkok Suvarnabhumi
26h 09m
2 stops
SEA9:59 pmSeattle/Tacoma Intl
$885

Air Canada flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Air Canada deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Air Canada
Sep 7
SEA10:40 amSeattle/Tacoma Intl
28h 25m
1 stop
BKK5:05 amBangkok Suvarnabhumi
Sep 28
BKK7:05 amBangkok Suvarnabhumi
17h 00m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$753
Air Canada
Sep 7
SEA10:40 amSeattle/Tacoma Intl
28h 25m
1 stop
BKK5:05 amBangkok Suvarnabhumi
Sep 21
BKK7:05 amBangkok Suvarnabhumi
25h 27m
1 stop
SEA6:32 pmSeattle/Tacoma Intl
$757
Air Canada
Aug 31
SEA5:50 amSeattle/Tacoma Intl
33h 15m
1 stop
BKK5:05 amBangkok Suvarnabhumi
Sep 23
BKK7:05 amBangkok Suvarnabhumi
29h 42m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$763

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 August 4, 2026.
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

Cheapest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/29

9:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Fri 11/13

9:35 am-7:10 am

1 stop36h 35m

$673

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/22

10:15 am-5:15 pm

1 stop41h 00m

Bangkok Suvarnabhumi

Thu 11/5

9:35 am-7:10 am

1 stop36h 35m

$683

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/7

10:40 am-5:05 am

1 stop28h 25m

Bangkok Suvarnabhumi

Mon 9/28

7:05 am-10:05 am

1 stop17h 00m

$753

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/14

10:50 am-5:05 am

1 stop28h 15m

Bangkok Suvarnabhumi

Wed 9/23

7:05 am-6:32 pm

1 stop25h 27m

$753

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/2

10:40 am-5:05 am

1 stop28h 25m

Bangkok Suvarnabhumi

Tue 9/22

3:45 pm-6:32 pm

2 stops40h 47m

$791

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/2

5:40 pm-12:35 pm

1 stop28h 55m

Bangkok Suvarnabhumi

Mon 10/19

11:45 am-3:15 pm

1 stop17h 30m

$798
Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/15

12:50 pm-11:35 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Mon 9/21

2:35 am-10:40 am

1 stop22h 05m

$809

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/1

11:00 am-11:00 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Mon 9/14

12:25 am-9:00 am

1 stop22h 35m

$809

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/1

11:00 am-11:00 pm

1 stop22h 00m

Bangkok Suvarnabhumi

Mon 9/14

12:20 am-9:00 am

1 stop22h 40m

$809

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 9/17

12:50 pm-11:35 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Wed 9/23

2:35 am-10:40 am

1 stop22h 05m

$833

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Prices are currently low for flights on this route.

Typical prices usually range from $718 to $965.
The lowest price recently found on this route was $673.

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 Seattle, with most prices found around $743. The month of October is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Seattle averaging around $749.

How far in advance should I book a flight from Seattle 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 $886 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 $777 on momondo.

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

As of August 2026, prices for Seattle to Bangkok Suvarnabhumi Airport flights are approximately 32% 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 15m

Direct flights

None
The fastest flight from Seattle to Bangkok Suvarnabhumi Airport takes 20h 15m
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

Frequently asked questions about flying from Seattle to Bangkok Suvarnabhumi Airport

  • 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 15m 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
Philippine AirlinesPriceFrom $149Free CancellationRating
7.3
1,013 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
Asiana AirlinesPriceFrom $623Free CancellationRating
8.1
553 reviews
Search Asiana Airlines flights
Air CanadaPriceFrom $623Free CancellationRating
7.1
11,428 reviews
Search Air Canada flights
Korean AirPriceFrom $652Free CancellationRating
8.4
1,222 reviews
Search Korean Air flights
ANAPriceFrom $685Free CancellationRating
8.3
1,288 reviews
Search ANA flights
DeltaPriceFrom $694Free CancellationRating
7.8
8,490 reviews
Search Delta flights
United AirlinesPriceFrom $702Free CancellationRating
7.4
10,060 reviews
Search United Airlines flights
Cathay PacificPriceFrom $705Free CancellationRating
7.6
1,438 reviews
Search Cathay Pacific 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 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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