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Cheap flights from Seattle to Thailand from $324

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 11/12. 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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0 bags

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Find the cheapest flights from Seattle to Thailand

Cheap round-trip flights

Asiana Airlines Logo
12:10 am - 10:05 pmSEA-BKK
30h 55m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$661Asiana Airlines
Find Deal
Tue, Nov 18 - Sun, Nov 30
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
$663Asiana Airlines
Find Deal
Tue, Sep 30 - Thu, Oct 2
Korean Air Logo
12:50 pm - 1:15 pmSEA-BKK
34h 25m1 stop
Korean Air Logo
12:55 am - 10:00 amBKK-SEA
23h 05m1 stop
$664Korean Air
Find Deal
Tue, Oct 21 - Tue, Oct 28
Singapore Airlines Logo
8:45 am - 7:50 amSEA-HKT
32h 05m1 stop
Singapore Airlines Logo
10:05 am - 7:10 amHKT-SEA
36h 05m1 stop
$666Singapore Airlines
Find Deal
Tue, Nov 4 - Thu, Nov 6
Korean Air Logo
12:50 pm - 1:05 amSEA-BKK
22h 15m1 stop
Korean Air Logo
2:35 am - 10:40 amBKK-SEA
22h 05m1 stop
$669Korean Air
Find Deal
Tue, Sep 30 - Mon, Oct 6
Singapore Airlines Logo
8:45 am - 6:45 pmSEA-BKK
43h 00m1 stop
Singapore Airlines Logo
9:35 am - 8:10 amBKK-SEA
36h 35m1 stop
$670Singapore Airlines
Find Deal
Tue, Jan 13 - Fri, Mar 13
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pmCNX-SEA
21h 45m1 stop
$752China Airlines
Find Deal
Tue, Feb 24 - Thu, Mar 5
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pmCNX-SEA
21h 45m1 stop
$778China Airlines
Find Deal
Mon, Feb 23 - Thu, Mar 5
EVA Air Logo
12:30 am - 10:25 amSEA-CNX
19h 55m1 stop
EVA Air Logo
11:35 am - 7:30 pmCNX-SEA
21h 55m1 stop
$841EVA Air
Find Deal
Tue, Oct 7 - Wed, Oct 22
EVA Air Logo
1:30 am - 10:25 amSEA-CNX
18h 55m1 stop
EVA Air Logo
11:50 am - 6:10 pmCNX-SEA
21h 20m1 stop
$861EVA Air
Find Deal
Mon, Oct 20 - Tue, Nov 25

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets
Philippine Airlines
Nov 9
SEA9:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Nov 30
BKK1:20 pmBangkok Suvarnabhumi
20h 20m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$665
Find similar
Philippine Airlines
Nov 26
SEA9:30 pmSeattle/Tacoma Intl
34h 30m
1 stop
BKK11:00 pmBangkok Suvarnabhumi
Dec 10
BKK1:20 pmBangkok Suvarnabhumi
20h 20m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$666
Find similar
Philippine Airlines
Nov 26
SEA9:30 pmSeattle/Tacoma Intl
29h 20m
1 stop
BKK5:50 pmBangkok Suvarnabhumi
Dec 25
BKK1:20 pmBangkok Suvarnabhumi
20h 20m
1 stop
SEA6:40 pmSeattle/Tacoma Intl
$668
Find similar

Asiana Airlines flights from Seattle to Thailand

Our best Asiana Airlines deals on Seattle to Thailand flight tickets
Asiana Airlines
Nov 18
SEA12:10 amSeattle/Tacoma Intl
30h 55m
1 stop
BKK10:05 pmBangkok Suvarnabhumi
Nov 30
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$661
Find similar
Asiana Airlines
Sep 30
SEA2:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
BKK11:10 pmBangkok Suvarnabhumi
Oct 2
BKK1:20 amBangkok Suvarnabhumi
25h 10m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$663
Find similar
Asiana Airlines
Oct 21
SEA2:15 pmSeattle/Tacoma Intl
18h 55m
1 stop
BKK11:10 pmBangkok Suvarnabhumi
Dec 10
BKK11:55 pmBangkok Suvarnabhumi
29h 00m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$667
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 September 17, 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

Tue 11/18

12:10 am-10:05 pm

1 stop30h 55m

Bangkok Suvarnabhumi

Sun 11/30

11:55 pm-1:55 pm

1 stop29h 00m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/30

2:15 pm-11:10 pm

1 stop18h 55m

Bangkok Suvarnabhumi

Thu 10/2

1:20 am-12:30 pm

1 stop25h 10m

$663

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 10/21

12:50 pm-1:15 pm

1 stop34h 25m

Bangkok Suvarnabhumi

Tue 10/28

12:55 am-10:00 am

1 stop23h 05m

$664

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 11/4

8:45 am-7:50 am

1 stop32h 05m

Phuket City

Thu 11/6

10:05 am-7:10 am

1 stop36h 05m

$666

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 9/30

12:50 pm-1:05 am

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 10/6

2:35 am-10:40 am

1 stop22h 05m

$669

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 1/13

8:45 am-6:45 pm

1 stop43h 00m

Bangkok Suvarnabhumi

Fri 3/13

9:35 am-8:10 am

1 stop36h 35m

$670

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 2/24

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/5

11:25 am-6:10 pm

1 stop21h 45m

$752

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 2/23

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/5

11:25 am-6:10 pm

1 stop21h 45m

$778

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/7

12:30 am-10:25 am

1 stop19h 55m

Chiang Mai

Wed 10/22

11:35 am-7:30 pm

1 stop21h 55m

$841

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 10/20

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Tue 11/25

11:50 am-6:10 pm

1 stop21h 20m

$861

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 February is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $776. If you are unable to visit Thailand during the month of February, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $784.

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 $912 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 $776 on momondo.

Cheap Seattle to Thailand flight deals and tips

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

Direct flights

None
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
7,961 reviews
Search Delta flights
Singapore AirlinesPriceFrom $526Free CancellationRating
8.1
1,367 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $605Free CancellationRating
7.2
911 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $628Free CancellationRating
8.2
481 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $673Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights
ANAPriceFrom $715Free CancellationRating
8.4
964 reviews
Search ANA flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
768 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $742Free CancellationRating
8.9
215 reviews
Search STARLUX Airlines flights
China EasternPriceFrom $755Free CancellationRating
7.2
166 reviews
Search China Eastern flights
Turkish AirlinesPriceFrom $773Free CancellationRating
7.3
3,965 reviews
Search Turkish 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.

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