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Cheap flights from Seattle to Chiang Mai from $405

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 3/29. 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.
Korean Air Logo
12:00 pm - 10:55 pmSEA-CNX
20h 55m1 stop
Korean Air Logo
12:15 am - 10:00 amCNX-SEA
23h 45m1 stop
$793Korean Air
Find Deal
Sun, Mar 15 - Wed, Mar 25
Delta Logo
12:35 pm - 10:55 pmSEA-CNX
20h 20m1 stop
Delta Logo
12:15 am - 2:20 pmCNX-SEA
28h 05m1 stop
$795Delta
Find Deal
Sun, Mar 8 - Tue, Mar 10
Korean Air Logo
7:20 am - 10:55 pmSEA-CNX
25h 35m2 stops
Korean Air Logo
12:15 am - 2:45 pmCNX-SEA
28h 30m2 stops
$799Korean Air
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Sun, Mar 15 - Thu, Mar 26
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
$807China Airlines
Find Deal
Mon, Jan 19 - Tue, Feb 24
Singapore Airlines Logo
9:45 am - 3:45 pmSEA-CNX
40h 00m1 stop
Singapore Airlines Logo
4:45 pm - 8:45 amCNX-SEA
30h 00m1 stop
$823Singapore Airlines
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Sat, Mar 21 - Sat, Mar 28
STARLUX Airlines Logo
11:45 pm - 3:55 pmSEA-CNX
25h 10m1 stop
STARLUX Airlines Logo
4:55 pm - 3:05 pmCNX-SEA
37h 10m1 stop
$835STARLUX Airlines
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Sun, Nov 16 - Sat, Nov 22
EVA Air Logo
11:30 pm - 10:35 amSEA-CNX
20h 05m1 stop
EVA Air Logo
11:50 am - 6:10 pmCNX-SEA
21h 20m1 stop
$837EVA Air
Find Deal
Thu, Jan 15 - Wed, Feb 25
EVA Air Logo
11:30 pm - 10:35 amSEA-CNX
20h 05m1 stop
EVA Air Logo
11:50 am - 6:10 pmCNX-SEA
21h 20m1 stop
$840EVA Air
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Tue, Jan 20 - Tue, Feb 24
China Airlines Logo
8:00 pm - 10:25 amSEA-CNX
48h 25m2 stops
China Airlines Logo
11:25 am - 10:56 amCNX-SEA
37h 31m2 stops
$851China Airlines
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Sat, Mar 14 - Sat, Mar 21
Singapore Airlines Logo
9:45 am - 3:45 pmSEA-CNX
40h 00m1 stop
Singapore Airlines Logo
12:05 pm - 8:10 amCNX-SEA
34h 05m1 stop
$893Singapore Airlines
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Sat, Mar 14 - Sat, Mar 21

EVA Air flights from Seattle to Chiang Mai

Our best EVA Air deals on Seattle to Chiang Mai flight tickets
EVA Air
Jan 15
SEA11:30 pmSeattle/Tacoma Intl
20h 05m
1 stop
CNX10:35 amChiang Mai
Feb 25
CNX11:50 amChiang Mai
21h 20m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$837
Find similar
EVA Air
Jan 20
SEA11:30 pmSeattle/Tacoma Intl
20h 05m
1 stop
CNX10:35 amChiang Mai
Feb 24
CNX11:50 amChiang Mai
21h 20m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$840
Find similar
EVA Air
Jan 19
SEA12:10 amSeattle/Tacoma Intl
19h 25m
1 stop
CNX10:35 amChiang Mai
Feb 24
CNX10:10 amChiang Mai
23h 00m
2 stops
SEA6:10 pmSeattle/Tacoma Intl
$858
Find similar

China Airlines flights from Seattle to Chiang Mai

Our best China Airlines deals on Seattle to Chiang Mai flight tickets
China Airlines
Jan 19
SEA12:10 amSeattle/Tacoma Intl
19h 15m
1 stop
CNX10:25 amChiang Mai
Feb 24
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$807
Find similar
China Airlines
Mar 14
SEA8:00 pmSeattle/Tacoma Intl
48h 25m
2 stops
CNX10:25 amChiang Mai
Mar 21
CNX11:25 amChiang Mai
37h 31m
2 stops
SEA10:56 amSeattle/Tacoma Intl
$851
Find similar
China Airlines
Mar 14
SEA8:00 pmSeattle/Tacoma Intl
48h 25m
2 stops
CNX10:25 amChiang Mai
Mar 21
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA7:10 pmSeattle/Tacoma Intl
$857
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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 November 6, 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

Sun 3/15

12:00 pm-10:55 pm

1 stop20h 55m

Chiang Mai

Wed 3/25

12:15 am-10:00 am

1 stop23h 45m

$793

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/8

12:35 pm-10:55 pm

1 stop20h 20m

Chiang Mai

Tue 3/10

12:15 am-2:20 pm

1 stop28h 05m

$795

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 3/15

7:20 am-10:55 pm

2 stops25h 35m

Chiang Mai

Thu 3/26

12:15 am-2:45 pm

2 stops28h 30m

$799

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Mon 1/19

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

Tue 2/24

11:25 am-6:10 pm

1 stop21h 45m

$807

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 3/21

9:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Sat 3/28

4:45 pm-8:45 am

1 stop30h 00m

$823

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sun 11/16

11:45 pm-3:55 pm

1 stop25h 10m

Chiang Mai

Sat 11/22

4:55 pm-3:05 pm

1 stop37h 10m

$835

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Thu 1/15

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Wed 2/25

11:50 am-6:10 pm

1 stop21h 20m

$837

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Tue 1/20

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

Tue 2/24

11:50 am-6:10 pm

1 stop21h 20m

$840

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 3/14

8:00 pm-10:25 am

2 stops48h 25m

Chiang Mai

Sat 3/21

11:25 am-10:56 am

2 stops37h 31m

$851

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

Sat 3/14

9:45 am-3:45 pm

1 stop40h 00m

Chiang Mai

Sat 3/21

12:05 pm-8:10 am

1 stop34h 05m

$893

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 September to fly from Seattle, when ticket prices are also cheap, with an average price of $772.

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 $1,000 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 November 2025, prices for Seattle to Chiang Mai flights are approximately 33% 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. 19h 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
Asiana AirlinesPriceFrom $660Free CancellationRating
8.2
484 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
777 reviews
Search China Airlines flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,393 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $814Free CancellationRating
8.4
1,160 reviews
Search Korean Air flights
EVA AirPriceFrom $865Free CancellationRating
8.4
1,270 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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