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Cheap flights from Seattle to Bangkok from $339

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 4/24. 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.
Singapore Airlines Logo
10:15 am - 8:05 am
SEA
-
BKK
31h 50m
1 stop
Singapore Airlines Logo
8:35 pm - 8:45 am
BKK
-
SEA
26h 10m
1 stop
$635Singapore Airlines
Tue, Sep 8 - Wed, Sep 16
Singapore Airlines Logo
10:15 am - 8:00 pm
SEA
-
BKK
19h 45m
1 stop
Singapore Airlines Logo
3:30 pm - 8:52 am
BKK
-
SEA
31h 22m
2 stops
$674Singapore Airlines
Sun, Aug 23 - Sun, Aug 30
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
11:45 am - 2:55 pm
BKK
-
SEA
17h 10m
1 stop
$676Asiana Airlines
Sun, Aug 23 - Thu, Sep 24
Singapore Airlines Logo
10:15 am - 7:00 pm
SEA
-
BKK
42h 45m
1 stop
Singapore Airlines Logo
9:10 pm - 1:38 pm
BKK
-
SEA
31h 28m
2 stops
$679Singapore Airlines
Tue, Sep 1 - Tue, Nov 3
Singapore Airlines Logo
10:15 am - 8:05 am
SEA
-
BKK
31h 50m
1 stop
Singapore Airlines Logo
8:35 pm - 8:45 am
BKK
-
SEA
26h 10m
1 stop
$684Singapore Airlines
Tue, Aug 25 - Thu, Sep 3
Singapore Airlines Logo
10:15 am - 2:15 pm
SEA
-
BKK
38h 00m
1 stop
Singapore Airlines Logo
1:35 pm - 8:45 am
BKK
-
SEA
33h 10m
1 stop
$686Singapore Airlines
Tue, Sep 15 - Thu, Oct 15
Singapore Airlines Logo
7:07 pm - 2:15 pm
SEA
-
BKK
29h 08m
2 stops
Singapore Airlines Logo
8:15 pm - 8:45 am
BKK
-
SEA
26h 30m
1 stop
$687Singapore Airlines
Mon, Aug 24 - Wed, Sep 23
Singapore Airlines Logo
10:15 am - 8:05 am
SEA
-
BKK
31h 50m
1 stop
Singapore Airlines Logo
3:30 pm - 8:52 am
BKK
-
SEA
31h 22m
2 stops
$693Singapore Airlines
Sun, Aug 23 - Sun, Aug 30
Singapore Airlines Logo
10:15 am - 12:20 pm
SEA
-
BKK
36h 05m
1 stop
Singapore Airlines Logo
3:30 pm - 8:52 am
BKK
-
SEA
31h 22m
2 stops
$696Singapore Airlines
Thu, Sep 3 - Sun, Sep 20
Multiple Airlines Logo
1:15 am - 11:05 pm
SEA
-
DMK
31h 50m
2 stops
Multiple Airlines Logo
7:30 am - 7:15 pm
DMK
-
SEA
25h 45m
2 stops
$1,004Multiple Airlines
Sun, Apr 26 - Mon, May 11

Asiana Airlines flights from Seattle to Bangkok

Our best Asiana Airlines deals on Seattle to Bangkok flight tickets
Asiana Airlines
Sep 14
SEA12:55 amSeattle/Tacoma Intl
19h 45m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Oct 15
BKK11:45 amBangkok Suvarnabhumi
17h 10m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$665
Asiana Airlines
Aug 23
SEA12:55 amSeattle/Tacoma Intl
32h 25m
1 stop
BKK11:20 pmBangkok Suvarnabhumi
Sep 24
BKK11:45 amBangkok Suvarnabhumi
17h 10m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$676
Asiana Airlines
Aug 23
SEA12:55 amSeattle/Tacoma Intl
19h 45m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Sep 22
BKK11:45 amBangkok Suvarnabhumi
17h 10m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$698

China Airlines flights from Seattle to Bangkok

Our best China Airlines deals on Seattle to Bangkok flight tickets
China Airlines
Aug 31
SEA1:55 amSeattle/Tacoma Intl
20h 15m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Nov 3
BKK10:55 amBangkok Suvarnabhumi
22h 15m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$721
China Airlines
Sep 8
SEA1:55 amSeattle/Tacoma Intl
17h 50m
1 stop
BKK9:45 amBangkok Suvarnabhumi
Sep 23
BKK2:40 amBangkok Suvarnabhumi
30h 35m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$742
China Airlines
Aug 24
SEA1:55 amSeattle/Tacoma Intl
20h 15m
1 stop
BKK12:10 pmBangkok Suvarnabhumi
Sep 29
BKK5:30 pmBangkok Suvarnabhumi
15h 45m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$770

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 March 30, 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

Cheapest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/8

10:15 am-8:05 am

1 stop31h 50m

Bangkok Suvarnabhumi

Wed 9/16

8:35 pm-8:45 am

1 stop26h 10m

$635

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/23

10:15 am-8:00 pm

1 stop19h 45m

Bangkok Suvarnabhumi

Sun 8/30

3:30 pm-8:52 am

2 stops31h 22m

$674
Quickest round-trip

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/23

12:55 am-11:20 pm

1 stop32h 25m

Bangkok Suvarnabhumi

Thu 9/24

11:45 am-2:55 pm

1 stop17h 10m

$676

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/1

10:15 am-7:00 pm

1 stop42h 45m

Bangkok Suvarnabhumi

Tue 11/3

9:10 pm-1:38 pm

2 stops31h 28m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 8/25

10:15 am-8:05 am

1 stop31h 50m

Bangkok Suvarnabhumi

Thu 9/3

8:35 pm-8:45 am

1 stop26h 10m

$684

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/15

10:15 am-2:15 pm

1 stop38h 00m

Bangkok Suvarnabhumi

Thu 10/15

1:35 pm-8:45 am

1 stop33h 10m

$686

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 8/24

7:07 pm-2:15 pm

2 stops29h 08m

Bangkok Suvarnabhumi

Wed 9/23

8:15 pm-8:45 am

1 stop26h 30m

$687

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 8/23

10:15 am-8:05 am

1 stop31h 50m

Bangkok Suvarnabhumi

Sun 8/30

3:30 pm-8:52 am

2 stops31h 22m

$693

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 9/3

10:15 am-12:20 pm

1 stop36h 05m

Bangkok Suvarnabhumi

Sun 9/20

3:30 pm-8:52 am

2 stops31h 22m

$696

SeattleBangkok

SEA - DMK

SEADMK

Seattle/Tacoma Intl

Sun 4/26

1:15 am-11:05 pm

2 stops31h 50m

Bangkok Don Mueang Intl

Mon 5/11

7:30 am-7:15 pm

2 stops25h 45m

$1,004

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 $751.

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 $866 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 $728 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 $149Free CancellationRating
7.3
978 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $511Free CancellationRating
8.2
1,484 reviews
Search Singapore Airlines flights
Air CanadaPriceFrom $623Free CancellationRating
7.1
10,862 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $627Free CancellationRating
8.1
507 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $656Free CancellationRating
8.4
1,203 reviews
Search Korean Air flights
ANAPriceFrom $680Free CancellationRating
8.4
1,159 reviews
Search ANA flights
DeltaPriceFrom $694Free CancellationRating
7.9
8,360 reviews
Search Delta flights
United AirlinesPriceFrom $700Free CancellationRating
7.4
9,517 reviews
Search United Airlines flights
Cathay PacificPriceFrom $704Free CancellationRating
7.6
1,234 reviews
Search Cathay Pacific flights
China AirlinesPriceFrom $714Free CancellationRating
8.3
817 reviews
Search China 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