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Cheap flights from Seattle to Chiang Mai from $551

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 8/16. 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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Find the cheapest flights from Seattle to Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
10:15 am - 4:35 pm
SEA
-
CNX
40h 20m
1 stop
Singapore Airlines Logo
11:30 am - 8:45 am
CNX
-
SEA
35h 15m
1 stop
$840Singapore Airlines
Tue, Oct 6 - Wed, Oct 14
Singapore Airlines Logo
10:15 am - 4:35 pm
SEA
-
CNX
40h 20m
1 stop
Singapore Airlines Logo
11:30 am - 8:45 am
CNX
-
SEA
35h 15m
1 stop
$846Singapore Airlines
Thu, Oct 1 - Fri, Oct 23
Singapore Airlines Logo
10:15 am - 4:35 pm
SEA
-
CNX
40h 20m
1 stop
Singapore Airlines Logo
5:35 pm - 8:45 am
CNX
-
SEA
53h 10m
1 stop
$928Singapore Airlines
Tue, Sep 8 - Tue, Sep 22
Delta Logo
11:25 am - 10:55 pm
SEA
-
CNX
44h 30m
2 stops
Delta Logo
12:15 am - 11:51 am
CNX
-
SEA
26h 36m
1 stop
$1,016Delta
Sat, Nov 7 - Wed, Nov 11
Singapore Airlines Logo
9:45 am - 3:45 pm
SEA
-
CNX
40h 00m
1 stop
Singapore Airlines Logo
4:45 pm - 7:10 am
CNX
-
SEA
29h 25m
1 stop
$1,018Singapore Airlines
Fri, Oct 30 - Fri, Nov 13
Singapore Airlines Logo
9:45 am - 3:45 pm
SEA
-
CNX
40h 00m
1 stop
Singapore Airlines Logo
4:45 pm - 7:10 am
CNX
-
SEA
29h 25m
1 stop
$1,026Singapore Airlines
Fri, Oct 30 - Fri, Nov 13
China Airlines Logo
1:15 am - 10:20 am
SEA
-
CNX
19h 05m
1 stop
China Airlines Logo
11:20 am - 7:15 pm
CNX
-
SEA
21h 55m
1 stop
$1,030China Airlines
Sun, Sep 27 - Tue, Oct 13
China Airlines Logo
12:10 am - 10:25 am
SEA
-
CNX
19h 15m
1 stop
China Airlines Logo
11:25 am - 6:10 pm
CNX
-
SEA
21h 45m
1 stop
$1,034China Airlines
Mon, Nov 2 - Thu, Nov 12
China Airlines Logo
1:15 am - 10:20 am
SEA
-
CNX
19h 05m
1 stop
China Airlines Logo
11:20 am - 7:15 pm
CNX
-
SEA
21h 55m
1 stop
$1,056China Airlines
Sun, Oct 4 - Thu, Oct 15
China Airlines Logo
12:10 am - 10:25 am
SEA
-
CNX
19h 15m
1 stop
China Airlines Logo
11:25 am - 6:10 pm
CNX
-
SEA
21h 45m
1 stop
$1,059China Airlines
Sun, Nov 1 - Mon, Nov 9

Singapore Airlines flights from Seattle to Chiang Mai

Our best Singapore Airlines deals on Seattle to Chiang Mai flight tickets
Singapore Airlines
Oct 6
SEA10:15 amSeattle/Tacoma Intl
40h 20m
1 stop
CNX4:35 pmChiang Mai
Oct 14
CNX11:30 amChiang Mai
35h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$840
Singapore Airlines
Oct 1
SEA10:15 amSeattle/Tacoma Intl
40h 20m
1 stop
CNX4:35 pmChiang Mai
Oct 23
CNX11:30 amChiang Mai
35h 15m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$846
Singapore Airlines
Sep 8
SEA10:15 amSeattle/Tacoma Intl
40h 20m
1 stop
CNX4:35 pmChiang Mai
Sep 22
CNX5:35 pmChiang Mai
53h 10m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$928

Cathay Pacific flights from Seattle to Chiang Mai

Our best Cathay Pacific deals on Seattle to Chiang Mai flight tickets
Cathay Pacific
Aug 25
SEA12:25 pmSeattle/Tacoma Intl
31h 20m
1 stop
CNX9:45 amChiang Mai
Jan 27
CNX7:40 pmChiang Mai
28h 30m
1 stop
SEA9:10 amSeattle/Tacoma Intl
$1,072
Cathay Pacific
May 20
SEA11:45 amSeattle/Tacoma Intl
32h 00m
1 stop
CNX9:45 amChiang Mai
May 27
CNX10:30 amChiang Mai
37h 35m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$1,618
Cathay Pacific
May 20
SEA11:45 amSeattle/Tacoma Intl
32h 00m
1 stop
CNX9:45 amChiang Mai
May 27
CNX10:30 amChiang Mai
37h 35m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$1,865

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 May 14, 2026.
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

Cheapest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 10/6

10:15 am-4:35 pm

1 stop40h 20m

Chiang Mai

Wed 10/14

11:30 am-8:45 am

1 stop35h 15m

$840

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 10/1

10:15 am-4:35 pm

1 stop40h 20m

Chiang Mai

Fri 10/23

11:30 am-8:45 am

1 stop35h 15m

$846

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 9/8

10:15 am-4:35 pm

1 stop40h 20m

Chiang Mai

Tue 9/22

5:35 pm-8:45 am

1 stop53h 10m

$928

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 11/7

11:25 am-10:55 pm

2 stops44h 30m

Chiang Mai

Wed 11/11

12:15 am-11:51 am

1 stop26h 36m

$1,016

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 10/30

9:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Fri 11/13

4:45 pm-7:10 am

1 stop29h 25m

$1,018

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Fri 10/30

9:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Fri 11/13

4:45 pm-7:10 am

1 stop29h 25m

$1,026
Quickest round-trip

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/27

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Tue 10/13

11:20 am-7:15 pm

1 stop21h 55m

$1,030

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 11/2

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 11/12

11:25 am-6:10 pm

1 stop21h 45m

$1,034

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 10/4

1:15 am-10:20 am

1 stop19h 05m

Chiang Mai

Thu 10/15

11:20 am-7:15 pm

1 stop21h 55m

$1,056

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 11/1

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Mon 11/9

11:25 am-6:10 pm

1 stop21h 45m

$1,059

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 typical price of a round-trip flight between Seattle and Chiang Mai?

What is the cheapest month to fly to Chiang Mai?

If you don’t want to visit Chiang Mai in February, then you should wait until August to fly from Seattle, when ticket prices are also cheap, with an average price of $834.

How far in advance should I book a flight from Seattle 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 $1,033 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 $777 on momondo.

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

As of May 2026, prices for Seattle to Chiang Mai flights are approximately 44% 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

18h 15m

Direct flights

None
The fastest flight from Seattle to Chiang Mai takes 18h 15m
There are no direct flights from Seattle to Chiang Mai. There are no popular flight routes from Seattle to Chiang Mai.
Search flight deals

Frequently asked questions about flying from Seattle to Chiang Mai

  • 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. 18h 15m 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
Korean AirPriceFrom $418Free CancellationRating
8.4
1,217 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $675Free CancellationRating
8.1
532 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $763Free CancellationRating
8.3
826 reviews
Search China Airlines flights
EVA AirPriceFrom $853Free CancellationRating
8.5
1,446 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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