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Cheap flights from Seattle to Bangkok from $405

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
9:55 am - 5:15 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
41h 20m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:05 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 25m1 stop Singapore Changi
$765Singapore Airlines
Thu, Oct 22 - Mon, Nov 16
Singapore Airlines Logo
8:40 am - 8:15 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
32h 35m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:05 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 25m1 stop Singapore Changi
$769Singapore Airlines
Sun, Nov 1 - Mon, Nov 9
Philippine Airlines Logo
9:30 pm - 12:05 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
23h 35m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
9:55 am - 6:45 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
23h 50m1 stop Manila Ninoy Aquino Intl
$783Philippine Airlines
Mon, Nov 9 - Wed, Dec 9
Hainan Airlines Logo
11:05 am - 10:40 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
33h 35m1 stop Chongqing Jiangbei Intl
Hainan Airlines Logo
4:20 pm - 8:20 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
31h 00m1 stop Beijing Capital
$786Hainan Airlines
Thu, Oct 29 - Fri, Nov 13
Hainan Airlines Logo
11:05 am - 10:40 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
33h 35m1 stop Chongqing Jiangbei Intl
Hainan Airlines Logo
11:50 am - 8:05 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
35h 15m1 stop Chongqing Jiangbei Intl
$786Hainan Airlines
Thu, Oct 29 - Wed, Nov 18
Philippine Airlines Logo
9:30 pm - 10:45 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
34h 15m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
11:40 pm - 6:45 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
34h 05m1 stop Manila Ninoy Aquino Intl
$796Philippine Airlines
Thu, Nov 19 - Wed, Dec 9
Korean Air Logo
12:10 am - 1:25 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
22h 15m1 stop Incheon Intl
Korean Air Logo
1:05 am - 9:05 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
23h 00m1 stop Incheon Intl
$807Korean Air
Sun, Nov 8 - Sun, Nov 22
China Airlines Logo
12:10 am - 1:05 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
21h 55m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
10:55 am - 6:10 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
22h 15m1 stop Taipei City Taiwan Taoyuan Intl
$819China Airlines
Tue, Dec 1 - Sun, Dec 20
China Airlines Logo
12:10 am - 9:50 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
18h 40m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
2:35 am - 6:10 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
30h 35m1 stop Taipei City Taiwan Taoyuan Intl
$822China Airlines
Sun, Feb 7 - Sat, Feb 27
Korean Air Logo
12:00 pm - 9:30 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
19h 30m1 stop Incheon Intl
Korean Air Logo
9:50 am - 2:55 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
19h 05m1 stop Incheon Intl
$822Korean Air
Mon, Mar 15 - Wed, Apr 7

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Hainan Airlines flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Hainan Airlines deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Hainan Airlines
Oct 29
SEA11:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Nov 13
BKK4:20 pmBangkok Suvarnabhumi
31h 00m
1 stop
SEA8:20 amSeattle/Tacoma Intl
$786
Hainan Airlines
Oct 29
SEA11:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Nov 13
BKK4:20 pmBangkok Suvarnabhumi
31h 00m
1 stop
SEA8:20 amSeattle/Tacoma Intl
$788
Hainan Airlines
Oct 29
SEA11:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Nov 13
BKK4:20 pmBangkok Suvarnabhumi
31h 00m
1 stop
SEA8:20 amSeattle/Tacoma Intl
$789

Korean Air flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Nov 8
SEA12:10 amSeattle/Tacoma Intl
22h 15m
1 stop
BKK1:25 pmBangkok Suvarnabhumi
Nov 22
BKK1:05 amBangkok Suvarnabhumi
23h 00m
1 stop
SEA9:05 amSeattle/Tacoma Intl
$807
Korean Air
Feb 25
SEA11:00 amSeattle/Tacoma Intl
22h 20m
1 stop
BKK12:20 amBangkok Suvarnabhumi
Apr 14
BKK9:50 amBangkok Suvarnabhumi
19h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$822
Korean Air
Feb 25
SEA2:30 pmSeattle/Tacoma Intl
31h 55m
2 stops
BKK1:25 pmBangkok Suvarnabhumi
Apr 1
BKK9:50 amBangkok Suvarnabhumi
19h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$828

momondo Fare Finder

 
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 Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 10/22

9:55 am-5:15 pm

1 stop41h 20m

Bangkok Suvarnabhumi

Mon 11/16

9:40 am-7:05 am

1 stop36h 25m

$765

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 11/1

8:40 am-8:15 am

1 stop32h 35m

Bangkok Suvarnabhumi

Mon 11/9

9:40 am-7:05 am

1 stop36h 25m

$769

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 11/9

9:30 pm-12:05 pm

1 stop23h 35m

Bangkok Suvarnabhumi

Wed 12/9

9:55 am-6:45 pm

1 stop23h 50m

$783

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 10/29

11:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Fri 11/13

4:20 pm-8:20 am

1 stop31h 00m

$786

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 10/29

11:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 11/18

11:50 am-8:05 am

1 stop35h 15m

$786

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 11/19

9:30 pm-10:45 pm

1 stop34h 15m

Bangkok Suvarnabhumi

Wed 12/9

11:40 pm-6:45 pm

1 stop34h 05m

$796

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 11/8

12:10 am-1:25 pm

1 stop22h 15m

Bangkok Suvarnabhumi

Sun 11/22

1:05 am-9:05 am

1 stop23h 00m

$807

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 12/1

12:10 am-1:05 pm

1 stop21h 55m

Bangkok Suvarnabhumi

Sun 12/20

10:55 am-6:10 pm

1 stop22h 15m

$819

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 2/7

12:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

Sat 2/27

2:35 am-6:10 pm

1 stop30h 35m

$822
Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 3/15

12:00 pm-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Wed 4/7

9:50 am-2:55 pm

1 stop19h 05m

$822

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?

Prices are currently typical for flights on this route.

Typical prices usually range from $686 to $871.
The lowest price recently found on this route was $765.

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 $748. The month of February is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Seattle averaging around $777.

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 $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 $811 on momondo.

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

As of October 2026, prices for Seattle to Bangkok Suvarnabhumi Airport flights are approximately 22% 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

Best Price Found

$405

Fastest flight time

19h 45m

Direct flights

None
The best one-way flight to Bangkok Suvarnabhumi Airport from Seattle in the past 72 hours is $405. The best round-trip flight deal from Seattle to Bangkok Suvarnabhumi Airport found on momondo in the last 72 hours is $765.
The fastest flight from Seattle to Bangkok Suvarnabhumi Airport takes 19h 45m
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. 19h 45m 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
1,028 reviews
Search Philippine Airlines flights
Hainan AirlinesPriceFrom $385Free CancellationRating
8.3
71 reviews
Search Hainan Airlines flights
Air CanadaPriceFrom $428Free CancellationRating
7.1
11,717 reviews
Search Air Canada flights
Singapore AirlinesPriceFrom $511Free CancellationRating
8.2
1,619 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $577Free CancellationRating
7.4
3,727 reviews
Search Qatar Airways flights
Asiana AirlinesPriceFrom $625Free CancellationRating
8.1
563 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $660Free CancellationRating
8.4
1,218 reviews
Search Korean Air flights
DeltaPriceFrom $694Free CancellationRating
7.8
8,628 reviews
Search Delta flights
ANAPriceFrom $701Free CancellationRating
8.3
1,319 reviews
Search ANA flights
United AirlinesPriceFrom $702Free CancellationRating
7.4
10,286 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
Ko Lan
Ayutthaya
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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