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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 3/14. 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.
Singapore Airlines Logo
8:45 am - 7:50 amSEA-HKT
32h 05m1 stop
Singapore Airlines Logo
6:00 pm - 7:10 amHKT-SEA
28h 10m1 stop
$555Singapore Airlines
Find Deal
Fri, Jan 23 - Fri, Feb 6
Singapore Airlines Logo
8:45 am - 5:10 pmSEA-HKT
41h 25m1 stop
Singapore Airlines Logo
2:55 pm - 7:10 amHKT-SEA
31h 15m1 stop
$582Singapore Airlines
Find Deal
Fri, Jan 23 - Fri, Feb 6
Singapore Airlines Logo
8:45 am - 7:25 pmSEA-HKT
19h 40m1 stop
Singapore Airlines Logo
10:05 am - 7:10 amHKT-SEA
36h 05m1 stop
$637Singapore Airlines
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Fri, Feb 20 - Thu, Mar 5
Asiana Airlines Logo
12:10 am - 8:55 pmSEA-HKT
29h 45m1 stop
Asiana Airlines Logo
10:55 pm - 1:55 pmHKT-SEA
30h 00m1 stop
$678Asiana Airlines
Find Deal
Sun, Nov 30 - Sun, Dec 7
Asiana Airlines Logo
12:10 am - 11:15 amSEA-BKK
21h 05m1 stop
Asiana Airlines Logo
12:20 pm - 2:55 pmBKK-SEA
16h 35m1 stop
$679Asiana Airlines
Find Deal
Sun, Mar 8 - Mon, Mar 30
ANA Logo
3:40 pm - 6:30 amSEA-BKK
23h 50m1 stop
ANA Logo
9:10 am - 9:00 pmBKK-SEA
26h 50m2 stops
$680ANA
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Wed, Dec 3 - Wed, Dec 17
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:20 am - 7:30 pmCNX-SEA
22h 10m1 stop
$752China Airlines
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Sun, Jan 18 - Tue, Mar 31
China Airlines Logo
1:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 7:10 pmCNX-SEA
21h 45m1 stop
$795China Airlines
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Thu, Mar 12 - Thu, Mar 26
EVA Air Logo
12:10 am - 10:35 amSEA-CNX
19h 25m1 stop
EVA Air Logo
11:35 am - 7:30 pmCNX-SEA
21h 55m1 stop
$820EVA Air
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Tue, Jan 20 - Mon, Apr 20
EVA Air Logo
12:10 am - 9:50 pmSEA-KBV
30h 40m2 stops
EVA Air Logo
9:50 am - 6:10 pmKBV-SEA
23h 20m2 stops
$936EVA Air
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Mon, Feb 23 - Tue, Mar 3

Korean Air flights from Seattle to Thailand

Our best Korean Air deals on Seattle to Thailand flight tickets
Korean Air
Dec 2
SEA11:00 amSeattle/Tacoma Intl
19h 30m
1 stop
BKK9:30 pmBangkok Suvarnabhumi
Dec 16
BKK2:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$677
Find similar
Korean Air
Feb 20
SEA11:00 amSeattle/Tacoma Intl
22h 55m
1 stop
BKK12:55 amBangkok Suvarnabhumi
Feb 24
BKK12:55 amBangkok Suvarnabhumi
23h 05m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$689
Find similar
Korean Air
Nov 26
SEA11:00 amSeattle/Tacoma Intl
22h 45m
1 stop
BKK12:45 amBangkok Suvarnabhumi
Dec 24
BKK2:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$698
Find similar

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets
Hainan Airlines
Nov 20
SEA10:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Dec 5
BKK1:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$686
Find similar
Hainan Airlines
Nov 25
SEA10:00 amSeattle/Tacoma Intl
37h 20m
1 stop
BKK2:20 pmBangkok Suvarnabhumi
Dec 8
BKK1:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$690
Find similar
Hainan Airlines
Nov 20
SEA10:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Dec 1
BKK4:15 pmBangkok Suvarnabhumi
30h 45m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$694
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 November 12, 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

Fri 1/23

8:45 am-7:50 am

1 stop32h 05m

Phuket City

Fri 2/6

6:00 pm-7:10 am

1 stop28h 10m

$555

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 1/23

8:45 am-5:10 pm

1 stop41h 25m

Phuket City

Fri 2/6

2:55 pm-7:10 am

1 stop31h 15m

$582

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Fri 2/20

8:45 am-7:25 pm

1 stop19h 40m

Phuket City

Thu 3/5

10:05 am-7:10 am

1 stop36h 05m

$637

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

Sun 11/30

12:10 am-8:55 pm

1 stop29h 45m

Phuket City

Sun 12/7

10:55 pm-1:55 pm

1 stop30h 00m

$678

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 3/8

12:10 am-11:15 am

1 stop21h 05m

Bangkok Suvarnabhumi

Mon 3/30

12:20 pm-2:55 pm

1 stop16h 35m

$679

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 12/3

3:40 pm-6:30 am

1 stop23h 50m

Bangkok Suvarnabhumi

Wed 12/17

9:10 am-9:00 pm

2 stops26h 50m

$680

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 1/18

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 3/31

11:20 am-7:30 pm

1 stop22h 10m

$752

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 3/12

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/26

11:25 am-7:10 pm

1 stop21h 45m

$795

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 1/20

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

Mon 4/20

11:35 am-7:30 pm

1 stop21h 55m

$820

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

Mon 2/23

12:10 am-9:50 pm

2 stops30h 40m

Krabi

Tue 3/3

9:50 am-6:10 pm

2 stops23h 20m

$936

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 $888 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 $737 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 58% 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

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
8,011 reviews
Search Delta flights
Singapore AirlinesPriceFrom $525Free CancellationRating
8.1
1,400 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $609Free CancellationRating
7.3
938 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $618Free CancellationRating
8.2
486 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $670Free CancellationRating
8.4
1,163 reviews
Search Korean Air flights
ANAPriceFrom $703Free CancellationRating
8.4
1,003 reviews
Search ANA flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
778 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,057 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $739Free CancellationRating
8.9
227 reviews
Search STARLUX Airlines flights
China EasternPriceFrom $754Free CancellationRating
7.2
177 reviews
Search China Eastern 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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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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