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Cheap flights from Seattle to Bangkok from $338

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 11/27. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Asiana Airlines Logo
12:10 am - 10:00 pmSEA-BKK
30h 50m1 stop
Asiana Airlines Logo
11:55 pm - 2:55 pmBKK-SEA
29h 00m1 stop
$651Asiana Airlines
Find Deal
Mon, Jan 5 - Thu, May 7
Asiana Airlines Logo
12:10 am - 10:00 pmSEA-BKK
31h 50m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$652Asiana Airlines
Find Deal
Sun, Oct 26 - Fri, Nov 21
Singapore Airlines Logo
9:45 am - 8:00 pmSEA-BKK
20h 15m1 stop
Singapore Airlines Logo
8:00 pm - 8:45 amBKK-SEA
26h 45m1 stop
$663Singapore Airlines
Find Deal
Sat, Mar 21 - Sat, Mar 28
Singapore Airlines Logo
8:45 am - 10:10 pmSEA-BKK
22h 25m1 stop
Singapore Airlines Logo
3:50 pm - 7:10 amBKK-SEA
30h 20m1 stop
$664Singapore Airlines
Find Deal
Sun, Nov 9 - Fri, Nov 21
Korean Air Logo
7:10 am - 12:45 amSEA-BKK
26h 35m2 stops
Korean Air Logo
12:55 am - 9:00 amBKK-SEA
23h 05m1 stop
$670Korean Air
Find Deal
Sun, Nov 9 - Sat, Nov 22
Korean Air Logo
7:10 am - 12:45 amSEA-BKK
26h 35m2 stops
Korean Air Logo
9:30 pm - 9:00 amBKK-SEA
26h 30m1 stop
$675Korean Air
Find Deal
Sun, Nov 9 - Sun, Nov 23
ANA Logo
3:40 pm - 5:10 amSEA-BKK
22h 30m1 stop
ANA Logo
9:10 am - 9:12 pmBKK-SEA
27h 02m2 stops
$684ANA
Find Deal
Thu, Nov 27 - Mon, Jan 26
Delta Logo
11:25 am - 11:20 pmSEA-BKK
20h 55m1 stop
Delta Logo
9:30 pm - 1:20 pmBKK-SEA
30h 50m1 stop
$695Delta
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Tue, Feb 10 - Thu, Mar 5
Delta Logo
11:15 am - 12:45 amSEA-BKK
22h 30m1 stop
Delta Logo
9:40 am - 1:20 pmBKK-SEA
18h 40m1 stop
$703Delta
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Mon, Nov 10 - Tue, Dec 9
ANA Logo
3:40 pm - 4:20 pmSEA-BKK
33h 40m1 stop
ANA Logo
2:20 pm - 1:20 pmBKK-SEA
38h 00m1 stop
$710ANA
Find Deal
Tue, Nov 4 - Tue, Nov 18

Asiana Airlines flights from Seattle to Bangkok

Our best Asiana Airlines deals on Seattle to Bangkok flight tickets
Asiana Airlines
Jan 5
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
May 7
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$651
Find similar
Asiana Airlines
Oct 26
SEA12:10 amSeattle/Tacoma Intl
31h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Nov 21
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$652
Find similar
Asiana Airlines
Dec 29
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Mar 3
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$653
Find similar

Philippine Airlines flights from Seattle to Bangkok

Our best Philippine Airlines deals on Seattle to Bangkok flight tickets
Philippine Airlines
Nov 19
SEA9:30 pmSeattle/Tacoma Intl
34h 30m
1 stop
BKK11:00 pmBangkok Suvarnabhumi
Dec 8
BKK11:50 pmBangkok Suvarnabhumi
33h 50m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$654
Find similar
Philippine Airlines
Nov 26
SEA9:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Dec 25
BKK1:20 pmBangkok Suvarnabhumi
20h 20m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$662
Find similar
Philippine Airlines
Feb 11
SEA9:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Mar 4
BKK1:20 pmBangkok Suvarnabhumi
20h 20m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$676
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 October 6, 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

Mon 1/5

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Thu 5/7

11:55 pm-2:55 pm

1 stop29h 00m

$651

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 10/26

12:10 am-10:00 pm

1 stop31h 50m

Bangkok Suvarnabhumi

Fri 11/21

11:55 pm-1:55 pm

1 stop29h 00m

$652

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 3/21

9:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Sat 3/28

8:00 pm-8:45 am

1 stop26h 45m

$663

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/9

8:45 am-10:10 pm

1 stop22h 25m

Bangkok Suvarnabhumi

Fri 11/21

3:50 pm-7:10 am

1 stop30h 20m

$664

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/9

7:10 am-12:45 am

2 stops26h 35m

Bangkok Suvarnabhumi

Sat 11/22

12:55 am-9:00 am

1 stop23h 05m

$670

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 11/9

7:10 am-12:45 am

2 stops26h 35m

Bangkok Suvarnabhumi

Sun 11/23

9:30 pm-9:00 am

1 stop26h 30m

$675

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 11/27

3:40 pm-5:10 am

1 stop22h 30m

Bangkok Suvarnabhumi

Mon 1/26

9:10 am-9:12 pm

2 stops27h 02m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/10

11:25 am-11:20 pm

1 stop20h 55m

Bangkok Suvarnabhumi

Thu 3/5

9:30 pm-1:20 pm

1 stop30h 50m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 11/10

11:15 am-12:45 am

1 stop22h 30m

Bangkok Suvarnabhumi

Tue 12/9

9:40 am-1:20 pm

1 stop18h 40m

$703

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/4

3:40 pm-4:20 pm

1 stop33h 40m

Bangkok Suvarnabhumi

Tue 11/18

2:20 pm-1:20 pm

1 stop38h 00m

$710

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 $763.

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 $899 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 $744 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. 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?

    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
7,966 reviews
Search Delta flights
Singapore AirlinesPriceFrom $523Free CancellationRating
8.1
1,374 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $605Free CancellationRating
7.3
918 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $624Free CancellationRating
8.2
486 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $671Free CancellationRating
8.4
1,147 reviews
Search Korean Air flights
ANAPriceFrom $712Free CancellationRating
8.4
983 reviews
Search ANA flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
216 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $743Free CancellationRating
8.3
767 reviews
Search China Airlines flights
China EasternPriceFrom $755Free CancellationRating
7.2
168 reviews
Search China Eastern flights
Turkish AirlinesPriceFrom $773Free CancellationRating
7.3
3,992 reviews
Search Turkish 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