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Cheap flights from Seattle to Bangkok from $397

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 9/6. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 5:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
41h 15m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:10 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 30m1 stop Singapore Changi
$676Singapore Airlines
Tue, Nov 3 - Thu, Nov 12
Singapore Airlines Logo
8:45 am - 2:35 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
38h 50m1 stop Singapore Changi
Singapore Airlines Logo
9:40 am - 7:10 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
36h 30m1 stop Singapore Changi
$681Singapore Airlines
Sun, Nov 1 - Sat, Nov 14
Multiple Airlines Logo
3:00 pm - 12:50 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
31h 50m2 stops Vancouver Intl Guangzhou Baiyun
Multiple Airlines Logo
6:05 pm - 9:40 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
29h 35m3 stops Guangzhou Baiyun Vancouver Intl Calgary
$732Multiple Airlines
Fri, Sep 4 - Fri, Sep 18
Asiana Airlines Logo
12:10 am - 10:40 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
20h 30m1 stop Incheon Intl
Asiana Airlines Logo
11:45 am - 3:15 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
17h 30m1 stop Incheon Intl
$750Asiana Airlines
Mon, Sep 28 - Tue, Oct 6
Air Canada Logo
3:00 pm - 5:05 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
24h 05m1 stop Vancouver Intl
Air Canada Logo
7:05 am - 6:32 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
25h 27m1 stop Vancouver Intl
$753Air Canada
Mon, Sep 14 - Mon, Oct 19
Air Canada Logo
10:40 am - 5:05 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
28h 25m1 stop Vancouver Intl
Air Canada Logo
7:05 am - 6:32 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
25h 27m1 stop Vancouver Intl
$753Air Canada
Mon, Sep 7 - Wed, Sep 30
Asiana Airlines Logo
12:10 am - 10:00 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
30h 50m1 stop Incheon Intl
Asiana Airlines Logo
12:20 pm - 1:55 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
16h 35m1 stop Incheon Intl
$758Asiana Airlines
Fri, Nov 27 - Tue, Dec 15
Multiple Airlines Logo
7:20 pm - 9:35 amSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
24h 15m2 stops Vancouver Intl Hong Kong Intl
Multiple Airlines Logo
7:05 am - 2:17 pmBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
21h 12m1 stop Vancouver Intl
$780Multiple Airlines
Mon, Aug 31 - Wed, Sep 30
Korean Air Logo
12:50 pm - 9:45 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
18h 55m1 stop Incheon Intl
Korean Air Logo
11:30 pm - 10:40 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
25h 10m1 stop Incheon Intl
$801Korean Air
Fri, Sep 11 - Wed, Sep 30
Korean Air Logo
7:15 am - 11:35 pmSEA  Seattle/Tacoma Intl-BKK Bangkok Suvarnabhumi
26h 20m2 stops San Francisco Incheon Intl
Korean Air Logo
9:50 am - 10:40 amBKK  Bangkok Suvarnabhumi-SEA Seattle/Tacoma Intl
38h 50m1 stop Incheon Intl
$802Korean Air
Fri, Sep 11 - Wed, Sep 30

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Asiana Airlines flights from Seattle to Bangkok

Our best Asiana Airlines deals on Seattle to Bangkok flight tickets
Asiana Airlines
Sep 28
SEA12:10 amSeattle/Tacoma Intl
20h 30m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Oct 6
BKK11:45 amBangkok Suvarnabhumi
17h 30m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$750
Asiana Airlines
Nov 17
SEA12:10 amSeattle/Tacoma Intl
30h 50m
1 stop
BKK10:00 pmBangkok Suvarnabhumi
Dec 5
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$758
Asiana Airlines
Sep 6
SEA12:10 amSeattle/Tacoma Intl
20h 30m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Sep 21
BKK11:45 amBangkok Suvarnabhumi
17h 30m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$762

Singapore Airlines flights from Seattle to Bangkok

Our best Singapore Airlines deals on Seattle to Bangkok flight tickets
Singapore Airlines
Nov 3
SEA8:45 amSeattle/Tacoma Intl
41h 15m
1 stop
BKK5:00 pmBangkok Suvarnabhumi
Nov 12
BKK9:40 amBangkok Suvarnabhumi
36h 30m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$676
Singapore Airlines
Sep 25
SEA10:15 amSeattle/Tacoma Intl
41h 00m
1 stop
BKK5:15 pmBangkok Suvarnabhumi
Oct 15
BKK9:20 amBangkok Suvarnabhumi
37h 25m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$681
Singapore Airlines
Oct 22
SEA10:15 amSeattle/Tacoma Intl
41h 00m
1 stop
BKK5:15 pmBangkok Suvarnabhumi
Oct 31
BKK9:40 amBangkok Suvarnabhumi
36h 30m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$685

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 August 18, 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 Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 11/3

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Thu 11/12

9:40 am-7:10 am

1 stop36h 30m

$676

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Sun 11/1

8:45 am-2:35 pm

1 stop38h 50m

Bangkok Suvarnabhumi

Sat 11/14

9:40 am-7:10 am

1 stop36h 30m

$681

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/4

3:00 pm-12:50 pm

2 stops31h 50m

Bangkok Suvarnabhumi

Fri 9/18

6:05 pm-9:40 am

3 stops29h 35m

$732
Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/28

12:10 am-10:40 am

1 stop20h 30m

Bangkok Suvarnabhumi

Tue 10/6

11:45 am-3:15 pm

1 stop17h 30m

$750

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/14

3:00 pm-5:05 am

1 stop24h 05m

Bangkok Suvarnabhumi

Mon 10/19

7:05 am-6:32 pm

1 stop25h 27m

$753

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 9/7

10:40 am-5:05 am

1 stop28h 25m

Bangkok Suvarnabhumi

Wed 9/30

7:05 am-6:32 pm

1 stop25h 27m

$753

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 11/27

12:10 am-10:00 pm

1 stop30h 50m

Bangkok Suvarnabhumi

Tue 12/15

12:20 pm-1:55 pm

1 stop16h 35m

$758

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 8/31

7:20 pm-9:35 am

2 stops24h 15m

Bangkok Suvarnabhumi

Wed 9/30

7:05 am-2:17 pm

1 stop21h 12m

$780

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/11

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Wed 9/30

11:30 pm-10:40 am

1 stop25h 10m

$801

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 9/11

7:15 am-11:35 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Wed 9/30

9:50 am-10:40 am

1 stop38h 50m

$802

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?

Prices are currently low for flights on this route.

Typical prices usually range from $746 to $996.
The lowest price recently found on this route was $676.

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of March, then book flights to Bangkok from Seattle during October instead. Flights to Bangkok in October, while not as cheap as those in March, still average around $762.

How far in advance should I book a flight from Seattle 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 $895 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 $740 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

Best Price Found

$397

Fastest flight time

18h 25m

Direct flights

None
The best one-way flight to Bangkok from Seattle in the past 72 hours is $397. The best round-trip flight deal from Seattle to Bangkok found on momondo in the last 72 hours is $676.
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

Frequently asked questions about flying from Seattle to Bangkok

  • 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 $149Free CancellationRating
7.3
1,017 reviews
Search Philippine Airlines flights
Hainan AirlinesPriceFrom $385Free CancellationRating
8.3
68 reviews
Search Hainan Airlines flights
Singapore AirlinesPriceFrom $510Free CancellationRating
8.2
1,584 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $577Free CancellationRating
7.4
3,738 reviews
Search Qatar Airways flights
Air CanadaPriceFrom $623Free CancellationRating
7.1
11,483 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $624Free CancellationRating
8.1
558 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $652Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
DeltaPriceFrom $694Free CancellationRating
7.8
8,503 reviews
Search Delta flights
ANAPriceFrom $699Free CancellationRating
8.3
1,298 reviews
Search ANA flights
United AirlinesPriceFrom $702Free CancellationRating
7.4
10,106 reviews
Search United 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