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Cheap flights from Seattle to Thailand from $278

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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
9:45 am - 5:10 pm
SEA
-
HKT
41h 25m1 stop
Singapore Airlines Logo
8:40 am - 8:10 am
HKT
-
SEA
37h 30m1 stop
$592Singapore Airlines
Thu, Mar 19 - Wed, Mar 25
Singapore Airlines Logo
9:45 am - 7:25 pm
SEA
-
HKT
19h 40m1 stop
Singapore Airlines Logo
8:15 pm - 8:10 am
HKT
-
SEA
25h 55m1 stop
$626Singapore Airlines
Fri, Mar 13 - Wed, Mar 18
Korean Air Logo
7:10 am - 11:20 pm
SEA
-
BKK
25h 10m2 stops
Korean Air Logo
2:05 am - 4:58 pm
BKK
-
SEA
29h 53m2 stops
$661Korean Air
Thu, Feb 12 - Sun, Feb 22
Korean Air Logo
11:00 am - 11:20 pm
SEA
-
BKK
21h 20m1 stop
Korean Air Logo
9:30 pm - 9:00 am
BKK
-
SEA
26h 30m1 stop
$677Korean Air
Sun, Feb 1 - Sun, Feb 8
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
HKT
31h 25m1 stop
Asiana Airlines Logo
10:15 pm - 2:55 pm
HKT
-
SEA
30h 40m1 stop
$712Asiana Airlines
Wed, Mar 18 - Mon, Mar 30
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
HKT
30h 25m1 stop
Asiana Airlines Logo
10:55 pm - 1:55 pm
HKT
-
SEA
30h 00m1 stop
$713Asiana Airlines
Tue, Dec 30 - Sat, Feb 28
China Airlines Logo
1:15 am - 10:20 am
SEA
-
CNX
19h 05m1 stop
China Airlines Logo
11:20 am - 7:15 pm
CNX
-
SEA
21h 55m1 stop
$739China Airlines
Mon, Apr 6 - Tue, May 12
EVA Air Logo
1:30 am - 10:25 am
SEA
-
CNX
18h 55m1 stop
EVA Air Logo
11:35 am - 7:30 pm
CNX
-
SEA
21h 55m1 stop
$775EVA Air
Mon, Apr 6 - Wed, May 13
China Airlines Logo
12:10 am - 10:25 am
SEA
-
CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pm
CNX
-
SEA
21h 45m1 stop
$792China Airlines
Sun, Jan 11 - Tue, Feb 3
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
Apr 2
SEA11:10 pmSeattle/Tacoma Intl
33h 30m
1 stop
BKK10:40 pmBangkok Suvarnabhumi
Apr 23
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$663
Find similar
Philippine Airlines
Feb 22
SEA9:30 pmSeattle/Tacoma Intl
23h 30m
1 stop
BKK12:00 pmBangkok Suvarnabhumi
Apr 28
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$665
Find similar
Philippine Airlines
Feb 19
SEA9:30 pmSeattle/Tacoma Intl
29h 20m
1 stop
BKK5:50 pmBangkok Suvarnabhumi
Apr 29
BKK11:40 pmBangkok Suvarnabhumi
34h 25m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$682
Find similar

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets
Hainan Airlines
Mar 5
SEA10:05 amSeattle/Tacoma Intl
33h 00m
2 stops
BKK10:05 amBangkok Suvarnabhumi
Mar 20
BKK4:20 pmBangkok Suvarnabhumi
30h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$671
Find similar
Hainan Airlines
Jan 31
SEA10:00 amSeattle/Tacoma Intl
22h 25m
1 stop
BKK11:25 pmBangkok Suvarnabhumi
Feb 13
BKK1:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$676
Find similar
Hainan Airlines
Jan 22
SEA10:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Feb 4
BKK11:50 amBangkok Suvarnabhumi
35h 15m
1 stop
SEA8:05 amSeattle/Tacoma Intl
$687
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 18, 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

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Thu 3/19

9:45 am-5:10 pm

1 stop41h 25m

Phuket City

Wed 3/25

8:40 am-8:10 am

1 stop37h 30m

$592

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 3/13

9:45 am-7:25 pm

1 stop19h 40m

Phuket City

Wed 3/18

8:15 pm-8:10 am

1 stop25h 55m

$626

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Thu 2/12

7:10 am-11:20 pm

2 stops25h 10m

Bangkok Suvarnabhumi

Sun 2/22

2:05 am-4:58 pm

2 stops29h 53m

$661

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 2/1

11:00 am-11:20 pm

1 stop21h 20m

Bangkok Suvarnabhumi

Sun 2/8

9:30 pm-9:00 am

1 stop26h 30m

$677

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Wed 3/18

12:10 am-9:35 pm

1 stop31h 25m

Phuket City

Mon 3/30

10:15 pm-2:55 pm

1 stop30h 40m

$712

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Tue 12/30

12:10 am-9:35 pm

1 stop30h 25m

Phuket City

Sat 2/28

10:55 pm-1:55 pm

1 stop30h 00m

$713

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 4/6

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Tue 5/12

11:20 am-7:15 pm

1 stop21h 55m

$739

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 4/6

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Wed 5/13

11:35 am-7:30 pm

1 stop21h 55m

$775

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 1/11

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 2/3

11:25 am-6:10 pm

1 stop21h 45m

$792

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 $893 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
8,009 reviews
Search Delta flights
Singapore AirlinesPriceFrom $518Free CancellationRating
8.1
1,414 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $605Free CancellationRating
7.3
943 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $611Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $685Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
ANAPriceFrom $694Free CancellationRating
8.4
1,030 reviews
Search ANA flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
792 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
245 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $753Free CancellationRating
7.4
9,093 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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Popular flights according to clicks in the last 7 days on momondo
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