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Cheap flights from Seattle to Bangkok from $349

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 11/25. 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

Philippine Airlines Logo
11:35 pm - 12:15 pmSEA-BKK
22h 40m1 stop
Philippine Airlines Logo
11:20 pm - 7:15 pmBKK-SEA
33h 55m1 stop
$676Philippine Airlines
Find Deal
Sun, Oct 12 - Thu, Oct 23
Asiana Airlines Logo
2:15 pm - 11:10 pmSEA-BKK
18h 55m1 stop
Asiana Airlines Logo
1:20 am - 12:30 pmBKK-SEA
25h 10m1 stop
$677Asiana Airlines
Find Deal
Sun, Sep 7 - Fri, Sep 19
Singapore Airlines Logo
8:45 am - 5:00 pmSEA-BKK
41h 15m1 stop
Singapore Airlines Logo
9:10 pm - 7:10 amBKK-SEA
25h 00m1 stop
$680Singapore Airlines
Find Deal
Thu, Feb 12 - Mon, Feb 23
ANA Logo
4:40 pm - 6:30 amSEA-BKK
23h 50m1 stop
ANA Logo
9:25 am - 1:20 pmBKK-SEA
18h 55m1 stop
$681ANA
Find Deal
Thu, Oct 30 - Tue, Nov 11
Singapore Airlines Logo
8:45 am - 8:00 pmSEA-BKK
20h 15m1 stop
Singapore Airlines Logo
8:00 pm - 7:10 amBKK-SEA
26h 10m1 stop
$682Singapore Airlines
Find Deal
Tue, Feb 10 - Mon, Feb 16
Korean Air Logo
12:50 pm - 9:45 pmSEA-BKK
18h 55m1 stop
Korean Air Logo
1:00 am - 9:00 amBKK-SEA
23h 00m1 stop
$693Korean Air
Find Deal
Tue, Oct 21 - Tue, Dec 9
Delta Logo
12:35 pm - 11:25 pmSEA-BKK
20h 50m1 stop
Delta Logo
2:35 am - 1:40 pmBKK-SEA
25h 05m1 stop
$695Delta
Find Deal
Wed, Sep 10 - Wed, Sep 17
ANA Logo
4:30 pm - 6:00 amSEA-BKK
23h 30m1 stop
ANA Logo
9:35 am - 6:36 pmBKK-SEA
23h 01m2 stops
$696ANA
Find Deal
Mon, Sep 1 - Wed, Sep 17
Korean Air Logo
11:00 am - 9:30 pmSEA-BKK
19h 30m1 stop
Korean Air Logo
9:30 pm - 9:00 amBKK-SEA
26h 30m1 stop
$698Korean Air
Find Deal
Tue, Nov 11 - Tue, Nov 18
Delta Logo
12:35 pm - 1:05 amSEA-BKK
22h 30m1 stop
Delta Logo
9:50 am - 1:30 pmBKK-SEA
17h 40m1 stop
$703Delta
Find Deal
Thu, Sep 25 - Thu, Oct 23

ANA flights from Seattle to Bangkok

Our best ANA deals on Seattle to Bangkok flight tickets
ANA
Oct 30
SEA4:40 pmSeattle/Tacoma Intl
23h 50m
1 stop
BKK6:30 amBangkok Suvarnabhumi
Nov 11
BKK9:25 amBangkok Suvarnabhumi
18h 55m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$681
Find similar
ANA
Sep 1
SEA4:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK6:00 amBangkok Suvarnabhumi
Sep 17
BKK9:35 amBangkok Suvarnabhumi
23h 01m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
$696
Find similar
ANA
Nov 11
SEA3:40 pmSeattle/Tacoma Intl
33h 40m
1 stop
BKK4:20 pmBangkok Suvarnabhumi
Dec 18
BKK9:25 amBangkok Suvarnabhumi
18h 55m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$710
Find similar

Korean Air flights from Seattle to Bangkok

Our best Korean Air deals on Seattle to Bangkok flight tickets
Korean Air
Oct 21
SEA12:50 pmSeattle/Tacoma Intl
18h 55m
1 stop
BKK9:45 pmBangkok Suvarnabhumi
Dec 9
BKK1:00 amBangkok Suvarnabhumi
23h 00m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$693
Find similar
Korean Air
Nov 11
SEA11:00 amSeattle/Tacoma Intl
19h 30m
1 stop
BKK9:30 pmBangkok Suvarnabhumi
Nov 18
BKK9:30 pmBangkok Suvarnabhumi
26h 30m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$698
Find similar
Korean Air
Oct 21
SEA7:10 amSeattle/Tacoma Intl
27h 55m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Dec 10
BKK9:30 pmBangkok Suvarnabhumi
26h 30m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$700
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 August 21, 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

Sun 10/12

11:35 pm-12:15 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Thu 10/23

11:20 pm-7:15 pm

1 stop33h 55m

$676

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 9/7

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Fri 9/19

1:20 am-12:30 pm

1 stop25h 10m

$677

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/12

8:45 am-5:00 pm

1 stop41h 15m

Bangkok Suvarnabhumi

Mon 2/23

9:10 pm-7:10 am

1 stop25h 00m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 10/30

4:40 pm-6:30 am

1 stop23h 50m

Bangkok Suvarnabhumi

Tue 11/11

9:25 am-1:20 pm

1 stop18h 55m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 2/10

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 2/16

8:00 pm-7:10 am

1 stop26h 10m

$682

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-9:45 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Tue 12/9

1:00 am-9:00 am

1 stop23h 00m

$693

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 9/10

12:35 pm-11:25 pm

1 stop20h 50m

Bangkok Suvarnabhumi

Wed 9/17

2:35 am-1:40 pm

1 stop25h 05m

$695

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 9/1

4:30 pm-6:00 am

1 stop23h 30m

Bangkok Suvarnabhumi

Wed 9/17

9:35 am-6:36 pm

2 stops23h 01m

$696

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 11/11

11:00 am-9:30 pm

1 stop19h 30m

Bangkok Suvarnabhumi

Tue 11/18

9:30 pm-9:00 am

1 stop26h 30m

$698

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 9/25

12:35 pm-1:05 am

1 stop22h 30m

Bangkok Suvarnabhumi

Thu 10/23

9:50 am-1:30 pm

1 stop17h 40m

$703

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 February, then book flights to Bangkok from Seattle during March instead. Flights to Bangkok in March, while not as cheap as those in February, still average around $820.

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 $926 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 $789 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
7,981 reviews
Search Delta flights
Singapore AirlinesPriceFrom $533Free CancellationRating
8.1
1,347 reviews
Search Singapore Airlines flights
Asiana AirlinesPriceFrom $629Free CancellationRating
8.2
475 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $681Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
Philippine AirlinesPriceFrom $700Free CancellationRating
7.2
899 reviews
Search Philippine Airlines flights
ANAPriceFrom $715Free CancellationRating
8.4
938 reviews
Search ANA flights
STARLUX AirlinesPriceFrom $741Free CancellationRating
9.0
207 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $747Free CancellationRating
8.3
764 reviews
Search China Airlines flights
China EasternPriceFrom $755Free CancellationRating
7.2
161 reviews
Search China Eastern flights
Turkish AirlinesPriceFrom $773Free CancellationRating
7.3
3,950 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