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Cheap flights from Seattle to Bangkok from $349

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 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Asiana Airlines Logo
2:15 pm - 11:10 pmSEA-BKK
18h 55m1 stop
Asiana Airlines Logo
1:20 am - 2:55 pmBKK-SEA
27h 35m1 stop
$677Asiana Airlines
Find Deal
Tue, Oct 14 - Sat, Oct 25
Philippine Airlines Logo
11:35 pm - 12:15 pmSEA-BKK
22h 40m1 stop
Philippine Airlines Logo
6:40 pm - 7:15 pmBKK-SEA
38h 35m1 stop
$678Philippine Airlines
Find Deal
Wed, Oct 15 - Sat, Oct 18
Asiana Airlines Logo
12:10 am - 10:05 pmSEA-BKK
30h 55m1 stop
Asiana Airlines Logo
11:55 pm - 2:55 pmBKK-SEA
29h 00m1 stop
$679Asiana Airlines
Find Deal
Sat, Jan 24 - Thu, Mar 26
Singapore Airlines Logo
8:45 am - 5:00 pmSEA-BKK
41h 15m1 stop
Singapore Airlines Logo
3:40 pm - 7:10 amBKK-SEA
30h 30m1 stop
$680Singapore Airlines
Find Deal
Thu, Feb 12 - Mon, Feb 23
ANA Logo
4:40 pm - 6:30 amSEA-BKK
23h 50m1 stop
ANA Logo
9:25 am - 1:20 pmBKK-SEA
18h 55m1 stop
$681ANA
Find Deal
Thu, Oct 30 - Tue, Nov 11
Singapore Airlines Logo
8:45 am - 8:00 pmSEA-BKK
20h 15m1 stop
Singapore Airlines Logo
8:00 pm - 7:10 amBKK-SEA
26h 10m1 stop
$684Singapore Airlines
Find Deal
Thu, Jan 22 - Wed, Feb 11
ANA Logo
4:30 pm - 4:35 amSEA-BKK
22h 05m1 stop
ANA Logo
9:35 am - 8:54 pmBKK-SEA
25h 19m2 stops
$690ANA
Find Deal
Mon, Sep 8 - Wed, Sep 24
Korean Air Logo
12:50 pm - 9:45 pmSEA-BKK
18h 55m1 stop
Korean Air Logo
1:00 am - 9:00 amBKK-SEA
23h 00m1 stop
$693Korean Air
Find Deal
Tue, Oct 21 - Tue, Dec 9
Korean Air Logo
12:50 pm - 9:45 pmSEA-BKK
18h 55m1 stop
Korean Air Logo
1:00 am - 10:00 amBKK-SEA
23h 00m1 stop
$694Korean Air
Find Deal
Tue, Oct 21 - Thu, Oct 30
Delta Logo
12:35 pm - 1:05 amSEA-BKK
22h 30m1 stop
Delta Logo
9:50 am - 1:40 pmBKK-SEA
17h 50m1 stop
$695Delta
Find Deal
Wed, Sep 10 - Mon, Sep 22

ANA flights from Seattle to Bangkok Suvarnabhumi Airport

Our best ANA deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
ANA
Oct 30
SEA4:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Nov 11
BKK9:25 amBangkok Suvarnabhumi
18h 55m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$681
Find similar
ANA
Sep 8
SEA4:30 pmSeattle/Tacoma Intl
22h 05m
1 stop
BKK4:35 amBangkok Suvarnabhumi
Sep 24
BKK9:35 amBangkok Suvarnabhumi
25h 19m
2 stops
SEA8:54 pmSeattle/Tacoma Intl
$690
Find similar
ANA
Nov 11
SEA3:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Dec 18
BKK9:25 amBangkok Suvarnabhumi
18h 55m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$710
Find similar

Korean Air flights from Seattle to Bangkok Suvarnabhumi Airport

Our best Korean Air deals on Seattle to Bangkok Suvarnabhumi Airport flight tickets
Korean Air
Oct 21
SEA12:50 pmSeattle/Tacoma Intl
18h 55m
1 stop
BKK9:45 pmBangkok Suvarnabhumi
Dec 9
BKK1:00 amBangkok Suvarnabhumi
23h 00m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$693
Find similar
Korean Air
Oct 21
SEA12:50 pmSeattle/Tacoma Intl
18h 55m
1 stop
BKK9:45 pmBangkok Suvarnabhumi
Oct 30
BKK1:00 amBangkok Suvarnabhumi
23h 00m
1 stop
SEA10:00 amSeattle/Tacoma Intl
$694
Find similar
Korean Air
Oct 21
SEA7:10 amSeattle/Tacoma Intl
26h 15m
2 stops
BKK11:25 pmBangkok Suvarnabhumi
Dec 10
BKK11:15 pmBangkok Suvarnabhumi
30h 30m
2 stops
SEA2:45 pmSeattle/Tacoma Intl
$696
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 August 19, 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 10/14

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Sat 10/25

1:20 am-2:55 pm

1 stop27h 35m

$677

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 10/15

11:35 pm-12:15 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Sat 10/18

6:40 pm-7:15 pm

1 stop38h 35m

$678

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 1/24

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Thu 3/26

11:55 pm-2:55 pm

1 stop29h 00m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/12

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Mon 2/23

3:40 pm-7:10 am

1 stop30h 30m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/30

4:40 pm-6:30 am

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 11/11

9:25 am-1:20 pm

1 stop18h 55m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/22

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Wed 2/11

8:00 pm-7:10 am

1 stop26h 10m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/8

4:30 pm-4:35 am

1 stop22h 05m

Bangkok Suvarnabhumi

Wed 9/24

9:35 am-8:54 pm

2 stops25h 19m

$690

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 12/9

1:00 am-9:00 am

1 stop23h 00m

$693

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Thu 10/30

1:00 am-10:00 am

1 stop23h 00m

$694

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/10

12:35 pm-1:05 am

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 9/22

9:50 am-1:40 pm

1 stop17h 50m

$695

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 February is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from Seattle, with most prices found around $786. The month of March is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from Seattle averaging around $820.

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 $926 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 $789 on momondo.

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

As of August 2025, prices for Seattle to Bangkok Suvarnabhumi Airport flights are approximately 33% 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

$349

Fastest flight time

18h 05m

Direct flights

None
The best one-way flight to Bangkok Suvarnabhumi Airport from Seattle in the past 72 hours is $349. The best round-trip flight deal from Seattle to Bangkok Suvarnabhumi Airport found on momondo in the last 72 hours is $677.
The fastest flight from Seattle to Bangkok Suvarnabhumi Airport takes 18h 05m
There are no direct flights from Seattle to Bangkok Suvarnabhumi Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - 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. 18h 55m 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
7,981 reviews
Search Delta flights
Singapore AirlinesPriceFrom $533Free CancellationRating
8.1
1,347 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $629Free CancellationRating
8.2
476 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $681Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
Philippine AirlinesPriceFrom $700Free CancellationRating
7.2
895 reviews
Search Philippine Airlines flights
ANAPriceFrom $715Free CancellationRating
8.4
934 reviews
Search ANA flights
STARLUX AirlinesPriceFrom $741Free CancellationRating
9.0
206 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $747Free CancellationRating
8.3
764 reviews
Search China Airlines flights
China EasternPriceFrom $755Free CancellationRating
7.2
160 reviews
Search China Eastern flights
Turkish AirlinesPriceFrom $773Free CancellationRating
7.3
3,950 reviews
Search Turkish 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
Ayutthaya
Chonburi
Cha-am
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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