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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 2/3. 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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Find the cheapest flights from Seattle to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Asiana Airlines Logo
12:10 am - 10:00 pm
SEA
-
BKK
30h 50m1 stop
Asiana Airlines Logo
12:20 pm - 2:55 pm
BKK
-
SEA
16h 35m1 stop
$643Asiana Airlines
Mon, Jan 19 - Wed, Mar 11
Singapore Airlines Logo
9:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
9:15 pm - 8:45 am
BKK
-
SEA
25h 30m1 stop
$646Singapore Airlines
Sat, Mar 14 - Mon, Apr 6
Asiana Airlines Logo
12:10 am - 10:00 pm
SEA
-
BKK
31h 50m1 stop
Asiana Airlines Logo
12:20 pm - 2:55 pm
BKK
-
SEA
16h 35m1 stop
$649Asiana Airlines
Mon, Mar 16 - Sun, Mar 22
Multiple Airlines Logo
8:00 pm - 12:55 pm
SEA
-
BKK
25h 55m2 stops
Multiple Airlines Logo
6:05 pm - 9:15 am
BKK
-
SEA
30h 10m2 stops
$650Multiple Airlines
Mon, Jan 19 - Mon, Feb 9
Philippine Airlines Logo
11:10 pm - 6:30 pm
SEA
-
BKK
29h 20m1 stop
Philippine Airlines Logo
1:25 pm - 8:05 pm
BKK
-
SEA
20h 40m1 stop
$651Philippine Airlines
Sun, Apr 19 - Tue, May 5
Asiana Airlines Logo
12:10 am - 11:15 am
SEA
-
BKK
21h 05m1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m1 stop
$654Asiana Airlines
Mon, Mar 23 - Sat, May 2
Asiana Airlines Logo
12:55 am - 11:10 pm
SEA
-
BKK
32h 15m1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m1 stop
$657Asiana Airlines
Thu, Apr 9 - Sun, Apr 19
Asiana Airlines Logo
12:10 am - 10:00 pm
SEA
-
BKK
30h 50m1 stop
Asiana Airlines Logo
12:20 pm - 2:55 pm
BKK
-
SEA
16h 35m1 stop
$658Asiana Airlines
Mon, Jan 19 - Wed, Mar 11
Korean Air Logo
11:00 am - 9:30 pm
SEA
-
BKK
19h 30m1 stop
Korean Air Logo
2:05 am - 9:00 am
BKK
-
SEA
21h 55m1 stop
$661Korean Air
Tue, Feb 17 - Sun, Mar 1
Asiana Airlines Logo
12:10 am - 11:15 am
SEA
-
BKK
20h 05m1 stop
Asiana Airlines Logo
12:20 pm - 1:55 pm
BKK
-
SEA
16h 35m1 stop
$662Asiana Airlines
Fri, Feb 6 - Sun, Feb 15

Asiana Airlines flights from Seattle to Bangkok

Our best Asiana Airlines deals on Seattle to Bangkok flight tickets
Asiana Airlines
Jan 19
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Mar 11
BKK12:20 pmBangkok Suvarnabhumi
16h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$643
Find similar
Asiana Airlines
Mar 16
SEA12:10 amSeattle/Tacoma Intl
31h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Mar 22
BKK12:20 pmBangkok Suvarnabhumi
16h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$649
Find similar
Asiana Airlines
Jan 23
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Feb 2
BKK12:20 pmBangkok Suvarnabhumi
16h 35m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$651
Find similar

Singapore Airlines flights from Seattle to Bangkok

Our best Singapore Airlines deals on Seattle to Bangkok flight tickets
Singapore Airlines
Mar 14
SEA9:45 amSeattle/Tacoma Intl
41h 15m
1 stop
BKK5:00 pmBangkok Suvarnabhumi
Apr 6
BKK9:15 pmBangkok Suvarnabhumi
25h 30m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$646
Find similar
Singapore Airlines
Feb 19
SEA8:45 amSeattle/Tacoma Intl
20h 15m
1 stop
BKK8:00 pmBangkok Suvarnabhumi
Mar 6
BKK11:10 pmBangkok Suvarnabhumi
23h 00m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$663
Find similar
Singapore Airlines
Mar 13
SEA9:45 amSeattle/Tacoma Intl
38h 50m
1 stop
BKK2:35 pmBangkok Suvarnabhumi
Apr 4
BKK12:15 pmBangkok Suvarnabhumi
34h 30m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$665
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Bangkok 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 January 6, 2026.
Use the filters below to find and compare flights from Seattle to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Wed 3/11

12:20 pm-2:55 pm

1 stop16h 35m

$643

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 3/14

9:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 4/6

9:15 pm-8:45 am

1 stop25h 30m

$646

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/16

12:10 am-10:00 pm

1 stop31h 50m

Bangkok Suvarnabhumi

Sun 3/22

12:20 pm-2:55 pm

1 stop16h 35m

$649

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

8:00 pm-12:55 pm

2 stops25h 55m

Bangkok Suvarnabhumi

Mon 2/9

6:05 pm-9:15 am

2 stops30h 10m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 4/19

11:10 pm-6:30 pm

1 stop29h 20m

Bangkok Suvarnabhumi

Tue 5/5

1:25 pm-8:05 pm

1 stop20h 40m

$651

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/23

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Sat 5/2

1:20 am-2:55 pm

1 stop27h 35m

$654

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 4/9

12:55 am-11:10 pm

1 stop32h 15m

Bangkok Suvarnabhumi

Sun 4/19

1:20 am-2:55 pm

1 stop27h 35m

$657

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 1/19

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Wed 3/11

12:20 pm-2:55 pm

1 stop16h 35m

$658

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/17

11:00 am-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Sun 3/1

2:05 am-9:00 am

1 stop21h 55m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 2/6

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Sun 2/15

12:20 pm-1:55 pm

1 stop16h 35m

$662

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

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?

If you aren’t able to travel during the month of September, then book flights to Bangkok from Seattle during February instead. Flights to Bangkok in February, while not as cheap as those in September, still average around $764.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $891 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from Seattle for as low as $741 on momondo.

Cheap Seattle to Bangkok flight deals and tips

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

Fastest flight time

18h 25m

Direct flights

None
The fastest flight from Seattle to Bangkok takes 18h 25m
There are no direct flights from Seattle to Bangkok. There are no popular flight routes from Seattle to Bangkok.
Search flight deals

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

    A flight from Seattle/Tacoma Intl to Bangkok will travel around 7436.9 mi. 18h 25m is a normal flight duration for this route.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Bangkok were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Bangkok.

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

    The required travel and health documents for your Bangkok trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Bangkok. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seattle to Bangkok

Compare and see reviews for airlines that fly from Seattle to Bangkok with momondo
Airline
Rating
Free Cancellation
Price
Philippine AirlinesPriceFrom $174Free CancellationRating
7.3
948 reviews
Search Philippine Airlines flights
DeltaPriceFrom $433Free CancellationRating
7.9
8,018 reviews
Search Delta flights
Singapore AirlinesPriceFrom $517Free CancellationRating
8.1
1,427 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $612Free CancellationRating
8.2
502 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $673Free CancellationRating
8.4
1,187 reviews
Search Korean Air flights
ANAPriceFrom $684Free CancellationRating
8.4
1,060 reviews
Search ANA flights
United AirlinesPriceFrom $700Free CancellationRating
7.4
9,132 reviews
Search United Airlines flights
China AirlinesPriceFrom $733Free CancellationRating
8.3
798 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,121 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
254 reviews
Search STARLUX Airlines flights

Why use momondo?

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

It is quick and easy to find Seattle to Bangkok flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Bangkok that suits you.

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

Flights from Seattle to Bangkok with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

Yes. momondo can track prices for Seattle to Bangkok flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok
Bangkok Suvarnabhumi Airport
Bangkok Don Mueang Intl Airport