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Cheap flights from Seattle to Bangkok from $325

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 4/7. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Asiana Airlines Logo
12:55 am - 10:40 am
SEA
-
BKK
19h 45m
1 stop
Asiana Airlines Logo
11:45 am - 2:55 pm
BKK
-
SEA
17h 10m
1 stop
$642Asiana Airlines
จ., เม.ย. 27 - อ., พ.ค. 12
Multiple Airlines Logo
10:15 am - 12:20 pm
SEA
-
BKK
36h 05m
1 stop
Multiple Airlines Logo
3:30 pm - 9:29 am
BKK
-
SEA
31h 59m
2 stops
$643Multiple Airlines
พฤ., เม.ย. 16 - อา., พ.ค. 10
Asiana Airlines Logo
12:10 am - 10:00 pm
SEA
-
BKK
30h 50m
1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pm
BKK
-
SEA
29h 00m
1 stop
$646Asiana Airlines
อา., มี.ค. 1 - ส., มี.ค. 7
Singapore Airlines Logo
10:15 am - 12:20 pm
SEA
-
BKK
36h 05m
1 stop
Singapore Airlines Logo
8:15 pm - 8:45 am
BKK
-
SEA
26h 30m
1 stop
$647Singapore Airlines
อา., มี.ค. 29 - จ., เม.ย. 6
Multiple Airlines Logo
9:45 am - 8:00 pm
SEA
-
BKK
20h 15m
1 stop
Multiple Airlines Logo
3:30 pm - 9:29 am
BKK
-
SEA
31h 59m
2 stops
$650Multiple Airlines
พฤ., มี.ค. 26 - อ., เม.ย. 28
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
1:20 am - 3:25 pm
BKK
-
SEA
28h 05m
1 stop
$651Asiana Airlines
จ., ก.ค. 27 - จ., ส.ค. 10
Multiple Airlines Logo
6:59 pm - 12:20 pm
SEA
-
BKK
27h 21m
2 stops
Multiple Airlines Logo
12:15 pm - 8:45 am
BKK
-
SEA
34h 30m
1 stop
$652Multiple Airlines
จ., เม.ย. 20 - จ., เม.ย. 27
Asiana Airlines Logo
12:55 am - 10:40 am
SEA
-
BKK
19h 45m
1 stop
Asiana Airlines Logo
11:45 am - 2:55 pm
BKK
-
SEA
17h 10m
1 stop
$653Asiana Airlines
อา., เม.ย. 19 - จ., เม.ย. 27
Singapore Airlines Logo
9:45 am - 8:00 pm
SEA
-
BKK
20h 15m
1 stop
Singapore Airlines Logo
1:35 pm - 8:45 am
BKK
-
SEA
33h 10m
1 stop
$654Singapore Airlines
อ., มี.ค. 10 - จ., เม.ย. 20
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m
1 stop
$656Asiana Airlines
อ., พ.ค. 5 - อา., พ.ค. 17

Singapore Airlines flights from Seattle to Bangkok

Our best Singapore Airlines deals on Seattle to Bangkok flight tickets
Singapore Airlines
Mar 29
SEA10:15 amSeattle/Tacoma Intl
36h 05m
1 stop
BKK12:20 pmBangkok Suvarnabhumi
Apr 6
BKK8:15 pmBangkok Suvarnabhumi
26h 30m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$647
Singapore Airlines
Mar 10
SEA9:45 amSeattle/Tacoma Intl
20h 15m
1 stop
BKK8:00 pmBangkok Suvarnabhumi
Apr 20
BKK1:35 pmBangkok Suvarnabhumi
33h 10m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$654
Singapore Airlines
Mar 24
SEA9:45 amSeattle/Tacoma Intl
20h 15m
1 stop
BKK8:00 pmBangkok Suvarnabhumi
May 14
BKK8:15 pmBangkok Suvarnabhumi
26h 30m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$663

Cathay Pacific flights from Seattle to Bangkok

Our best Cathay Pacific deals on Seattle to Bangkok flight tickets
Cathay Pacific
Apr 8
SEA11:45 amSeattle/Tacoma Intl
33h 20m
1 stop
BKK11:05 amBangkok Suvarnabhumi
Jul 12
BKK3:00 pmBangkok Suvarnabhumi
33h 20m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$700
Cathay Pacific
Mar 30
SEA11:45 amSeattle/Tacoma Intl
37h 40m
1 stop
BKK3:25 pmBangkok Suvarnabhumi
Jun 29
BKK7:35 amBangkok Suvarnabhumi
16h 45m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$704
Cathay Pacific
Apr 9
SEA11:45 amSeattle/Tacoma Intl
22h 25m
1 stop
BKK12:10 amBangkok Suvarnabhumi
May 4
BKK7:35 amBangkok Suvarnabhumi
16h 30m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$705

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 กุมภาพันธ์ 19, 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

จ. 4/27

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

อ. 5/12

11:45 am-2:55 pm

1 stop17h 10m

$642

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

พฤ. 4/16

10:15 am-12:20 pm

1 stop36h 05m

Bangkok Suvarnabhumi

อา. 5/10

3:30 pm-9:29 am

2 stops31h 59m

$643

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

อา. 3/1

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

ส. 3/7

11:55 pm-1:55 pm

1 stop29h 00m

$646

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

อา. 3/29

10:15 am-12:20 pm

1 stop36h 05m

Bangkok Suvarnabhumi

จ. 4/6

8:15 pm-8:45 am

1 stop26h 30m

$647

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

พฤ. 3/26

9:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

อ. 4/28

3:30 pm-9:29 am

2 stops31h 59m

$650

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

จ. 7/27

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

จ. 8/10

1:20 am-3:25 pm

1 stop28h 05m

$651

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

จ. 4/20

6:59 pm-12:20 pm

2 stops27h 21m

Bangkok Suvarnabhumi

จ. 4/27

12:15 pm-8:45 am

1 stop34h 30m

$652

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

อา. 4/19

12:55 am-10:40 am

1 stop19h 45m

Bangkok Suvarnabhumi

จ. 4/27

11:45 am-2:55 pm

1 stop17h 10m

$653

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

อ. 3/10

9:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

จ. 4/20

1:35 pm-8:45 am

1 stop33h 10m

$654

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

อ. 5/5

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

อา. 5/17

1:20 am-2:55 pm

1 stop27h 35m

$656

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 $760.

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 $876 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 $715 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

19h 45m

Direct flights

None
The fastest flight from Seattle to Bangkok takes 19h 45m
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 45m 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 $154Free CancellationRating
7.2
957 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $514Free CancellationRating
8.2
1,463 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $626Free CancellationRating
8.1
504 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $663Free CancellationRating
8.4
1,194 reviews
Search Korean Air flights
ANAPriceFrom $683Free CancellationRating
8.4
1,096 reviews
Search ANA flights
DeltaPriceFrom $694Free CancellationRating
7.9
8,214 reviews
Search Delta flights
United AirlinesPriceFrom $700Free CancellationRating
7.4
9,322 reviews
Search United Airlines flights
China AirlinesPriceFrom $731Free CancellationRating
8.3
804 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,171 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
274 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