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Cheap flights from Seattle to Chiang Mai from $383

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 10/26. 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

Asiana Airlines Logo
2:15 pm - 11:40 pmSEA-CNX
19h 25m1 stop
Asiana Airlines Logo
12:45 am - 12:30 pmCNX-SEA
25h 45m1 stop
$702Asiana Airlines
Find Deal
Thu, Sep 25 - Sun, Oct 12
Asiana Airlines Logo
2:15 pm - 11:40 pmSEA-CNX
19h 25m1 stop
Asiana Airlines Logo
12:45 am - 12:30 pmCNX-SEA
25h 45m1 stop
$713Asiana Airlines
Find Deal
Thu, Sep 25 - Sun, Oct 12
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
$787China Airlines
Find Deal
Tue, Nov 18 - Thu, Dec 11
China Airlines Logo
1:10 am - 10:20 amSEA-CNX
19h 10m1 stop
China Airlines Logo
11:25 am - 7:10 pmCNX-SEA
21h 45m1 stop
$798China Airlines
Find Deal
Mon, Oct 13 - Thu, Oct 30
Korean Air Logo
12:50 pm - 9:55 pmSEA-CNX
19h 05m1 stop
Korean Air Logo
11:15 pm - 10:40 amCNX-SEA
25h 25m1 stop
$799Korean Air
Find Deal
Mon, Sep 22 - Tue, Oct 14
Korean Air Logo
7:20 am - 9:55 pmSEA-CNX
24h 35m2 stops
Korean Air Logo
11:15 pm - 10:40 amCNX-SEA
25h 25m1 stop
$804Korean Air
Find Deal
Mon, Sep 22 - Tue, Oct 14
Delta Logo
12:35 pm - 9:55 pmSEA-CNX
19h 20m1 stop
Delta Logo
11:15 pm - 1:30 pmCNX-SEA
28h 15m1 stop
$836Delta
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Mon, Sep 22 - Thu, Oct 16
Delta Logo
12:35 pm - 9:55 pmSEA-CNX
19h 20m1 stop
Delta Logo
11:15 pm - 1:30 pmCNX-SEA
28h 15m1 stop
$876Delta
Find Deal
Sat, Sep 27 - Thu, Oct 16
EVA Air Logo
1:30 am - 2:50 pmSEA-CNX
23h 20m2 stops
EVA Air Logo
11:50 am - 7:10 pmCNX-SEA
21h 20m1 stop
$878EVA Air
Find Deal
Mon, Oct 13 - Thu, Oct 30
EVA Air Logo
1:30 am - 10:25 amSEA-CNX
18h 55m1 stop
EVA Air Logo
11:35 am - 7:30 pmCNX-SEA
21h 55m1 stop
$910EVA Air
Find Deal
Sun, Sep 21 - Thu, Oct 16

China Airlines flights from Seattle to Chiang Mai

Our best China Airlines deals on Seattle to Chiang Mai flight tickets
China Airlines
Nov 18
SEA12:10 amSeattle/Tacoma Intl
19h 15m
1 stop
CNX10:25 amChiang Mai
Dec 11
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$787
Find similar
China Airlines
Oct 13
SEA1:10 amSeattle/Tacoma Intl
19h 10m
1 stop
CNX10:20 amChiang Mai
Oct 30
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA7:10 pmSeattle/Tacoma Intl
$798
Find similar
China Airlines
Sep 25
SEA1:10 amSeattle/Tacoma Intl
19h 10m
1 stop
CNX10:20 amChiang Mai
Oct 13
CNX5:25 pmChiang Mai
15h 55m
1 stop
SEA7:20 pmSeattle/Tacoma Intl
$830
Find similar

Korean Air flights from Seattle to Chiang Mai

Our best Korean Air deals on Seattle to Chiang Mai flight tickets
Korean Air
Sep 22
SEA12:50 pmSeattle/Tacoma Intl
19h 05m
1 stop
CNX9:55 pmChiang Mai
Oct 14
CNX11:15 pmChiang Mai
25h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$799
Find similar
Korean Air
Sep 22
SEA7:20 amSeattle/Tacoma Intl
24h 35m
2 stops
CNX9:55 pmChiang Mai
Oct 14
CNX11:15 pmChiang Mai
25h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$804
Find similar
Korean Air
Sep 25
SEA12:50 pmSeattle/Tacoma Intl
19h 05m
1 stop
CNX9:55 pmChiang Mai
Oct 14
CNX11:15 pmChiang Mai
25h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$807
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 September 15, 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

Thu 9/25

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Sun 10/12

12:45 am-12:30 pm

1 stop25h 45m

$702

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 9/25

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

Sun 10/12

12:45 am-12:30 pm

1 stop25h 45m

$713

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 11/18

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Thu 12/11

11:25 am-6:10 pm

1 stop21h 45m

$787

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 10/13

1:10 am-10:20 am

1 stop19h 10m

Chiang Mai

Thu 10/30

11:25 am-7:10 pm

1 stop21h 45m

$798

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/22

12:50 pm-9:55 pm

1 stop19h 05m

Chiang Mai

Tue 10/14

11:15 pm-10:40 am

1 stop25h 25m

$799

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/22

7:20 am-9:55 pm

2 stops24h 35m

Chiang Mai

Tue 10/14

11:15 pm-10:40 am

1 stop25h 25m

$804

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 9/22

12:35 pm-9:55 pm

1 stop19h 20m

Chiang Mai

Thu 10/16

11:15 pm-1:30 pm

1 stop28h 15m

$836

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 9/27

12:35 pm-9:55 pm

1 stop19h 20m

Chiang Mai

Thu 10/16

11:15 pm-1:30 pm

1 stop28h 15m

$876

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 10/13

1:30 am-2:50 pm

2 stops23h 20m

Chiang Mai

Thu 10/30

11:50 am-7:10 pm

1 stop21h 20m

$878

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 9/21

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

Thu 10/16

11:35 am-7:30 pm

1 stop21h 55m

$910

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 March, then you should wait until August to fly from Seattle, when ticket prices are also cheap, with an average price of $830.

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 $996 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 $753 on momondo.

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

As of September 2025, prices for Seattle to Chiang Mai flights are approximately 41% 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

Direct flights

None
There are no direct flights from Seattle to Chiang Mai. There are no popular flight routes from Seattle to Chiang Mai.
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  • 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 55m 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 $669Free CancellationRating
8.2
479 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
767 reviews
Search China Airlines flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,365 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $814Free CancellationRating
8.4
1,139 reviews
Search Korean Air flights
EVA AirPriceFrom $865Free CancellationRating
8.4
1,236 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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