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Cheap flights from Seattle to Bangkok from $352

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 1/18. 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

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Philippine Airlines Logo
9:30 pm - 5:50 pmSEA-BKK
29h 20m1 stop
Philippine Airlines Logo
1:20 pm - 7:40 pmBKK-SEA
20h 20m1 stop
$678Philippine Airlines
Find Deal
Fri, Feb 27 - Thu, Mar 26
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
$679Asiana Airlines
Find Deal
Sat, Feb 21 - Thu, Mar 5
ANA Logo
3:45 pm - 6:30 amSEA-BKK
23h 45m1 stop
ANA Logo
7:10 am - 1:20 pmBKK-SEA
21h 10m1 stop
$680ANA
Find Deal
Sun, Jan 11 - Wed, Jan 21
Asiana Airlines Logo
12:10 am - 10:00 pmSEA-BKK
30h 50m1 stop
Asiana Airlines Logo
12:20 pm - 1:55 pmBKK-SEA
16h 35m1 stop
$682Asiana Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
8:45 am - 8:00 pmSEA-BKK
20h 15m1 stop
Multiple Airlines Logo
3:30 pm - 9:57 amBKK-SEA
32h 27m2 stops
$683Multiple Airlines
Find Deal
Sun, Mar 1 - Tue, Mar 31
Asiana Airlines Logo
12:10 am - 11:15 amSEA-BKK
20h 05m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$684Asiana Airlines
Find Deal
Sat, Feb 14 - Sun, Mar 1
Multiple Airlines Logo
8:45 am - 8:25 amSEA-BKK
32h 40m1 stop
Multiple Airlines Logo
3:50 pm - 10:01 amBKK-SEA
33h 11m2 stops
$685Multiple Airlines
Find Deal
Thu, Jan 15 - Tue, Feb 3
Asiana Airlines Logo
12:10 am - 11:15 amSEA-BKK
20h 05m1 stop
Asiana Airlines Logo
11:55 pm - 2:55 pmBKK-SEA
29h 00m1 stop
$686Asiana Airlines
Find Deal
Wed, Feb 25 - Thu, Mar 19
Asiana Airlines Logo
12:10 am - 11:15 amSEA-BKK
20h 05m1 stop
Asiana Airlines Logo
11:55 pm - 2:55 pmBKK-SEA
29h 00m1 stop
$687Asiana Airlines
Find Deal
Mon, Feb 23 - Thu, Mar 19
Multiple Airlines Logo
8:45 am - 2:35 pmSEA-BKK
38h 50m1 stop
Multiple Airlines Logo
3:50 pm - 10:01 amBKK-SEA
33h 11m2 stops
$689Multiple Airlines
Find Deal
Thu, Jan 15 - Tue, Feb 3

Asiana Airlines flights from Seattle to Bangkok

Our best Asiana Airlines deals on Seattle to Bangkok flight tickets
Asiana Airlines
Mar 2
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Mar 24
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$678
Find similar
Asiana Airlines
Mar 14
SEA12:10 amSeattle/Tacoma Intl
21h 05m
1 stop
BKK11:15 amBangkok Suvarnabhumi
Sep 8
BKK12:20 pmBangkok Suvarnabhumi
16h 35m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$679
Find similar
Asiana Airlines
Nov 25
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Dec 12
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$682
Find similar

ANA flights from Seattle to Bangkok

Our best ANA deals on Seattle to Bangkok flight tickets
ANA
Jan 11
SEA3:45 pmSeattle/Tacoma Intl
23h 45m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Jan 21
BKK7:10 amBangkok Suvarnabhumi
21h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$680
Find similar
ANA
Nov 28
SEA3:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Dec 17
BKK9:10 amBangkok Suvarnabhumi
19h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$708
Find similar
ANA
Dec 3
SEA3:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Dec 14
BKK2:20 pmBangkok Suvarnabhumi
38h 00m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$709
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 November 20, 2025.
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

Fri 2/27

9:30 pm-5:50 pm

1 stop29h 20m

Bangkok Suvarnabhumi

Thu 3/26

1:20 pm-7:40 pm

1 stop20h 20m

$678

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/21

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Thu 3/5

11:55 pm-1:55 pm

1 stop29h 00m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 1/11

3:45 pm-6:30 am

1 stop23h 45m

Bangkok Suvarnabhumi

Wed 1/21

7:10 am-1:20 pm

1 stop21h 10m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/14

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Sat 2/21

12:20 pm-1:55 pm

1 stop16h 35m

$682

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Tue 3/31

3:30 pm-9:57 am

2 stops32h 27m

$683

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 2/14

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Sun 3/1

11:55 pm-1:55 pm

1 stop29h 00m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/15

8:45 am-8:25 am

1 stop32h 40m

Bangkok Suvarnabhumi

Tue 2/3

3:50 pm-10:01 am

2 stops33h 11m

$685

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 2/25

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Thu 3/19

11:55 pm-2:55 pm

1 stop29h 00m

$686

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 2/23

12:10 am-11:15 am

1 stop20h 05m

Bangkok Suvarnabhumi

Thu 3/19

11:55 pm-2:55 pm

1 stop29h 00m

$687

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/15

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Tue 2/3

3:50 pm-10:01 am

2 stops33h 11m

$689

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 typical price of a round-trip flight between Seattle and Bangkok?

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 $759.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $931. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Seattle to Bangkok on a Friday will generally be more expensive and average around $1,111. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Bangkok?

According to our data, the cheapest time of day to fly to Bangkok is in the morning. momondo users have found flights departing from Seattle to Bangkok in the morning for as low as $986. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,081. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $888 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 $739 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

Direct flights

None
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. 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?

    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
DeltaPriceFrom $433Free CancellationRating
7.9
8,002 reviews
Search Delta flights
Singapore AirlinesPriceFrom $525Free CancellationRating
8.1
1,407 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $609Free CancellationRating
7.3
937 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $618Free CancellationRating
8.2
488 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $670Free CancellationRating
8.4
1,170 reviews
Search Korean Air flights
ANAPriceFrom $703Free CancellationRating
8.4
1,009 reviews
Search ANA flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,064 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $739Free CancellationRating
8.9
232 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $741Free CancellationRating
8.3
782 reviews
Search China Airlines flights
China EasternPriceFrom $754Free CancellationRating
7.2
178 reviews
Search China Eastern 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