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Cheap flights from Seattle to Thailand from $307

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 Thailand departing on 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Thailand

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:45 am - 6:45 pm
SEA
-
BKK
43h 00m1 stop
Multiple Airlines Logo
8:00 pm - 1:55 pm
BKK
-
SEA
31h 55m2 stops
$666Multiple Airlines
Sun, Mar 1 - Tue, Mar 10
Hainan Airlines Logo
10:05 am - 10:40 am
SEA
-
BKK
33h 35m1 stop
Hainan Airlines Logo
11:50 am - 8:05 am
BKK
-
SEA
35h 15m1 stop
$680Hainan Airlines
Thu, Jan 22 - Wed, Feb 4
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
9:10 pm - 7:10 am
BKK
-
SEA
25h 00m1 stop
$681Singapore Airlines
Fri, Jan 30 - Mon, Feb 9
China Airlines Logo
12:10 am - 9:50 am
SEA
-
BKK
18h 40m1 stop
China Airlines Logo
5:50 pm - 6:10 pm
BKK
-
SEA
15h 20m1 stop
$692China Airlines
Tue, Jan 13 - Mon, Feb 2
Asiana Airlines Logo
12:10 am - 11:15 am
SEA
-
BKK
21h 05m1 stop
Asiana Airlines Logo
12:20 pm - 2:55 pm
BKK
-
SEA
16h 35m1 stop
$696Asiana Airlines
Mon, Mar 9 - Tue, Mar 31
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
HKT
30h 25m1 stop
Asiana Airlines Logo
10:15 pm - 2:55 pm
HKT
-
SEA
30h 40m1 stop
$711Asiana Airlines
Sun, Mar 1 - Mon, Mar 30
China Airlines Logo
1:10 am - 10:25 am
SEA
-
CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 7:10 pm
CNX
-
SEA
21h 45m1 stop
$759China Airlines
Mon, Mar 9 - Tue, Mar 17
EVA Air Logo
12:10 am - 10:35 am
SEA
-
CNX
19h 25m1 stop
EVA Air Logo
11:35 am - 6:50 pm
CNX
-
SEA
21h 15m1 stop
$775EVA Air
Sun, Mar 1 - Thu, Apr 30
Singapore Airlines Logo
8:45 am - 3:45 pm
SEA
-
CNX
40h 00m1 stop
Singapore Airlines Logo
12:05 pm - 8:10 am
CNX
-
SEA
34h 05m1 stop
$807Singapore Airlines
Thu, Mar 5 - Sat, Mar 14
EVA Air Logo
11:30 pm - 10:35 am
SEA
-
CNX
20h 05m1 stop
EVA Air Logo
11:50 am - 6:10 pm
CNX
-
SEA
21h 20m1 stop
$813EVA Air
Thu, Jan 1 - Thu, Jan 22

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets
Philippine Airlines
Feb 26
SEA9:30 pmSeattle/Tacoma Intl
34h 30m
1 stop
BKK11:00 pmBangkok Suvarnabhumi
Mar 31
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$682
Find similar
Philippine Airlines
Feb 27
SEA9:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Mar 31
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$702
Find similar
Philippine Airlines
Feb 27
SEA9:30 pmSeattle/Tacoma Intl
34h 30m
1 stop
BKK11:00 pmBangkok Suvarnabhumi
Mar 31
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$704
Find similar

United Airlines flights from Seattle to Thailand

Our best United Airlines deals on Seattle to Thailand flight tickets
United Airlines
Mar 3
SEA3:45 pmSeattle/Tacoma Intl
22h 25m
1 stop
BKK5:10 amBangkok Suvarnabhumi
Mar 29
BKK9:35 amBangkok Suvarnabhumi
18h 50m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$701
Find similar
United Airlines
May 6
SEA7:37 pmSeattle/Tacoma Intl
42h 58m
2 stops
BKK4:35 amBangkok Suvarnabhumi
May 13
BKK9:35 amBangkok Suvarnabhumi
18h 50m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$705
Find similar
United Airlines
May 7
SEA4:30 pmSeattle/Tacoma Intl
22h 05m
1 stop
BKK4:35 amBangkok Suvarnabhumi
May 19
BKK9:35 amBangkok Suvarnabhumi
46h 59m
2 stops
SEA6:34 pmSeattle/Tacoma Intl
$711
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Thailand 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 December 11, 2025.
Use the filters below to find and compare flights from Seattle to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/1

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

Tue 3/10

8:00 pm-1:55 pm

2 stops31h 55m

$666

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 1/22

10:05 am-10:40 am

1 stop33h 35m

Bangkok Suvarnabhumi

Wed 2/4

11:50 am-8:05 am

1 stop35h 15m

$680

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 1/30

8:45 am-8:00 pm

1 stop20h 15m

Bangkok Suvarnabhumi

Mon 2/9

9:10 pm-7:10 am

1 stop25h 00m

$681

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

12:10 am-9:50 am

1 stop18h 40m

Bangkok Suvarnabhumi

Mon 2/2

5:50 pm-6:10 pm

1 stop15h 20m

$692

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 3/9

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Tue 3/31

12:20 pm-2:55 pm

1 stop16h 35m

$696

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 3/1

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Mon 3/30

10:15 pm-2:55 pm

1 stop30h 40m

$711

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/9

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 3/17

11:25 am-7:10 pm

1 stop21h 45m

$759

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/1

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Thu 4/30

11:35 am-6:50 pm

1 stop21h 15m

$775

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 3/5

8:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Sat 3/14

12:05 pm-8:10 am

1 stop34h 05m

$807

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 1/1

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Thu 1/22

11:50 am-6:10 pm

1 stop21h 20m

$813

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 Thailand from

How to get the cheapest flight ticket from Seattle to Thailand

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 Thailand?

The month of September is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $751. If you are unable to visit Thailand during the month of September, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $759.

What is the cheapest day to depart on your flight to Thailand?

The cheapest day to depart on your flight to Thailand is on a Tuesday when prices can be found for as low as $931. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Friday, with ticket prices averaging around $1,111.

What is the cheapest time of day to depart on your flight to Thailand?

Flying to Thailand from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as $986 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Thailand is at noon when prices are around $1,081.

How far in advance should I book a flight to Thailand?

You are more likely to see cheaper flights to Thailand from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $894 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from Seattle for as low as $750 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 59% on your flight if you consider stops on a Seattle to Thailand flight.

Cheap Seattle to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Thailand

Fastest flight time

19h 05m

Direct flights

None
The fastest flight from Seattle to Thailand takes 19h 05m
There are no direct flights from Seattle to Thailand. There are no popular flight routes from Seattle to Thailand.
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Thailand?

    Prices for flights from Seattle/Tacoma Intl Airport to Thailand were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Thailand?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Thailand?

    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 Thailand.

  • What documentation or ID do you need to fly to Thailand?

    The required travel and health documents for your Thailand 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 Thailand. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seattle to Thailand

Compare and see reviews for airlines that fly from Seattle to Thailand with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $433Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Singapore AirlinesPriceFrom $520Free CancellationRating
8.1
1,412 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $605Free CancellationRating
7.3
941 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $612Free CancellationRating
8.2
492 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $679Free CancellationRating
8.4
1,184 reviews
Search Korean Air flights
ANAPriceFrom $695Free CancellationRating
8.4
1,021 reviews
Search ANA flights
China AirlinesPriceFrom $730Free CancellationRating
8.2
788 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
243 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $753Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Thailand?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Thailand for you.

Can I find flights from Seattle to Thailand with flexible booking policies on momondo?

Yes. All flights to Thailand from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Thailand?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Thailand.

I’m not ready to book a flight from Seattle to Thailand right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Thailand now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Thailand and let you know when they change.

An easier way to manage your Thailand trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to Thailand

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