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Cheap flights from Seattle to Chiang Mai from $431

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 Chiang Mai departing on 1/15. 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 Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
China Airlines Logo
12:10 am - 10:25 am
SEA
-
CNX
19h 15m1 stop
China Airlines Logo
5:35 pm - 7:10 pm
CNX
-
SEA
15h 35m1 stop
$796China Airlines
Sun, Mar 1 - Mon, Mar 9
Korean Air Logo
5:55 pm - 10:55 pm
SEA
-
CNX
39h 00m2 stops
Korean Air Logo
12:15 am - 10:00 am
CNX
-
SEA
23h 45m1 stop
$798Korean Air
Sun, Mar 15 - Wed, Mar 18
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
$801China Airlines
Mon, Mar 9 - Thu, Mar 12
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
$803China Airlines
Sun, Mar 1 - Sat, Mar 7
China Eastern Logo
7:15 am - 2:20 pm
SEA
-
CNX
40h 05m2 stops
China Eastern Logo
11:20 pm - 2:54 pm
CNX
-
SEA
30h 34m2 stops
$805China Eastern
Mon, Jan 12 - Tue, Feb 3
Delta Logo
11:30 am - 10:55 pm
SEA
-
CNX
20h 25m1 stop
Delta Logo
12:15 am - 10:00 am
CNX
-
SEA
47h 45m2 stops
$809Delta
Mon, Mar 2 - Sun, Mar 8
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

STARLUX Airlines flights from Seattle to Chiang Mai

Our best STARLUX Airlines deals on Seattle to Chiang Mai flight tickets
STARLUX Airlines
Mar 1
SEA11:45 pmSeattle/Tacoma Intl
25h 10m
1 stop
CNX3:55 pmChiang Mai
Mar 7
CNX4:55 pmChiang Mai
37h 10m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
$855
Find similar
STARLUX Airlines
Jan 22
SEA11:45 pmSeattle/Tacoma Intl
26h 15m
1 stop
CNX5:00 pmChiang Mai
Jan 29
CNX4:55 pmChiang Mai
37h 10m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
$878
Find similar

EVA Air flights from Seattle to Chiang Mai

Our best EVA Air deals on Seattle to Chiang Mai flight tickets
EVA Air
Apr 6
SEA1:30 amSeattle/Tacoma Intl
18h 55m
1 stop
CNX10:25 amChiang Mai
May 13
CNX11:35 amChiang Mai
21h 55m
1 stop
SEA7:30 pmSeattle/Tacoma Intl
$775
Find similar
EVA Air
Jan 1
SEA11:30 pmSeattle/Tacoma Intl
20h 05m
1 stop
CNX10:35 amChiang Mai
Jan 22
CNX11:50 amChiang Mai
21h 20m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$813
Find similar
EVA Air
Jan 1
SEA11:30 pmSeattle/Tacoma Intl
20h 05m
1 stop
CNX10:35 amChiang Mai
Jan 22
CNX12:10 pmChiang Mai
21h 00m
2 stops
SEA6:10 pmSeattle/Tacoma Intl
$843
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Chiang Mai 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 Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

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

Sun 3/1

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Mon 3/9

5:35 pm-7:10 pm

1 stop15h 35m

$796

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/15

5:55 pm-10:55 pm

2 stops39h 00m

Chiang Mai

Wed 3/18

12:15 am-10:00 am

1 stop23h 45m

$798

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/9

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 3/12

11:25 am-7:10 pm

1 stop21h 45m

$801

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/1

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Sat 3/7

11:25 am-6:10 pm

1 stop21h 45m

$803

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 1/12

7:15 am-2:20 pm

2 stops40h 05m

Chiang Mai

Tue 2/3

11:20 pm-2:54 pm

2 stops30h 34m

$805

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 3/2

11:30 am-10:55 pm

1 stop20h 25m

Chiang Mai

Sun 3/8

12:15 am-10:00 am

2 stops47h 45m

$809

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 Chiang Mai from

How to get the cheapest flight ticket from Seattle to Chiang Mai

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 Chiang Mai?

If you don’t want to visit Chiang Mai in September, then you should wait until March to fly from Seattle, when ticket prices are also cheap, with an average price of $802.

What is the cheapest day to depart on your flight to Chiang Mai?

The cheapest day to depart from Seattle to Chiang Mai is on a Tuesday. Travelers who choose to depart for Chiang Mai on a Tuesday will often find tickets for as low as $882. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chiang Mai for around $1,415.

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

Flying to Chiang Mai from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as $929 when looking at flights departing in the morning. Flights to Chiang Mai are more costly in the evening, with an average ticket price of $1,057. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Chiang Mai?

You are more likely to see cheaper flights to Chiang Mai from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chiang Mai for around $1,005 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chiang Mai from Seattle for as low as $776 on momondo.

How have Seattle to Chiang Mai flight prices changed over time?

As of December 2025, prices for Seattle to Chiang Mai flights are approximately 25% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Chiang Mai

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Chiang Mai according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Chiang Mai (SEA to CNX) flight deals and tips

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

Fastest flight time

19h 25m

Direct flights

None
The fastest flight from Seattle to Chiang Mai takes 19h 25m
There are no direct flights from Seattle to Chiang Mai. There are no popular flight routes from Seattle to Chiang Mai.
Search flight deals

  • How far is Seattle/Tacoma Intl to Chiang Mai by plane?

    The distance between Seattle/Tacoma Intl and Chiang Mai is about 7178.6 mi. 19h 25m is a normal flight duration for this route.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Chiang Mai Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Chiang Mai Airport.

  • What documentation or ID do you need to fly to Chiang Mai Airport?

    The necessary travel and health documents for your Chiang Mai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Chiang Mai?

Best airlines flying from Seattle to Chiang Mai

Compare and see reviews for airlines that fly from Seattle to Chiang Mai with momondo
Airline
Rating
Free Cancellation
Price
Asiana AirlinesPriceFrom $673Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
792 reviews
Search China Airlines flights
Korean AirPriceFrom $752Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,413 reviews
Search Singapore Airlines flights
EVA AirPriceFrom $862Free CancellationRating
8.4
1,295 reviews
Search EVA Air flights

Why use momondo?

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

Finding the right flight to Chiang Mai from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chiang Mai quick and easy, saving you time and money.

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

Flights from Seattle to Chiang Mai 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 Chiang Mai?

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 Chiang Mai.

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

Price alerts on flights to Chiang Mai from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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