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Cheap flights from Seattle to Chiang Mai from $369

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 9/15. 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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Find the cheapest flights from Seattle to Chiang Mai (SEA-CNX)

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
$675Asiana Airlines
Find Deal
lun., sep. 1 - dom., sep. 14
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
$677Asiana Airlines
Find Deal
lun., sep. 1 - lun., sep. 15
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
$679Asiana Airlines
Find Deal
mar., sep. 2 - dom., sep. 7
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
$760Korean Air
Find Deal
mar., sep. 2 - lun., sep. 8
China Airlines Logo
1:40 am - 10:20 amSEA-CNX
18h 40m1 stop
China Airlines Logo
5:35 pm - 6:10 pmCNX-SEA
15h 35m1 stop
$781China Airlines
Find Deal
lun., sep. 1 - lun., nov. 17
Korean Air Logo
5:41 pm - 9:55 pmSEA-CNX
38h 14m2 stops
Korean Air Logo
11:15 pm - 10:40 amCNX-SEA
25h 25m1 stop
$803Korean Air
Find Deal
lun., sep. 1 - lun., sep. 15
China Airlines Logo
1:40 am - 10:20 amSEA-CNX
18h 40m1 stop
China Airlines Logo
11:20 am - 7:20 pmCNX-SEA
22h 00m1 stop
$815China Airlines
Find Deal
dom., ago. 31 - mar., sep. 16
EVA Air Logo
12:30 am - 10:25 amSEA-CNX
19h 55m1 stop
EVA Air Logo
11:35 am - 7:30 pmCNX-SEA
21h 55m1 stop
$836EVA Air
Find Deal
lun., sep. 1 - lun., sep. 8
EVA Air Logo
1:30 am - 10:25 amSEA-CNX
18h 55m1 stop
EVA Air Logo
11:50 am - 6:10 pmCNX-SEA
21h 20m1 stop
$846EVA Air
Find Deal
dom., oct. 5 - mié., nov. 19
Singapore Airlines Logo
10:15 am - 4:40 pmSEA-CNX
40h 25m1 stop
Singapore Airlines Logo
4:35 pm - 7:10 amCNX-SEA
53h 35m1 stop
$904Singapore Airlines
Find Deal
mar., oct. 21 - mar., nov. 4

China Airlines flights from Seattle to Chiang Mai

Our best China Airlines deals on Seattle to Chiang Mai flight tickets
China Airlines
Sep 1
SEA1:40 amSeattle/Tacoma Intl
18h 40m
1 stop
CNX10:20 amChiang Mai
Nov 17
CNX5:35 pmChiang Mai
15h 35m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$781
Find similar
China Airlines
Aug 31
SEA1:40 amSeattle/Tacoma Intl
18h 40m
1 stop
CNX10:20 amChiang Mai
Sep 16
CNX11:20 amChiang Mai
22h 00m
1 stop
SEA7:20 pmSeattle/Tacoma Intl
$815
Find similar
China Airlines
Nov 15
SEA12:10 amSeattle/Tacoma Intl
25h 25m
1 stop
CNX4:35 pmChiang Mai
Feb 28
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$889
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 2
SEA12:50 pmSeattle/Tacoma Intl
19h 05m
1 stop
CNX9:55 pmChiang Mai
Sep 8
CNX11:15 pmChiang Mai
25h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$760
Find similar
Korean Air
Sep 1
SEA5:41 pmSeattle/Tacoma Intl
38h 14m
2 stops
CNX9:55 pmChiang Mai
Sep 15
CNX11:15 pmChiang Mai
25h 25m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$803
Find similar
Korean Air
Oct 21
SEA12:50 pmSeattle/Tacoma Intl
19h 05m
1 stop
CNX9:55 pmChiang Mai
Nov 24
CNX12:15 amChiang Mai
23h 45m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$806
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 agosto 26, 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

lun. 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

dom. 9/14

12:45 am-12:30 pm

1 stop25h 45m

$675

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 9/1

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

lun. 9/15

12:45 am-12:30 pm

1 stop25h 45m

$677

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 9/2

2:15 pm-11:40 pm

1 stop19h 25m

Chiang Mai

dom. 9/7

12:45 am-12:30 pm

1 stop25h 45m

$679

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 9/2

12:50 pm-9:55 pm

1 stop19h 05m

Chiang Mai

lun. 9/8

11:15 pm-10:40 am

1 stop25h 25m

$760

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 9/1

1:40 am-10:20 am

1 stop18h 40m

Chiang Mai

lun. 11/17

5:35 pm-6:10 pm

1 stop15h 35m

$781

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 9/1

5:41 pm-9:55 pm

2 stops38h 14m

Chiang Mai

lun. 9/15

11:15 pm-10:40 am

1 stop25h 25m

$803

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 8/31

1:40 am-10:20 am

1 stop18h 40m

Chiang Mai

mar. 9/16

11:20 am-7:20 pm

1 stop22h 00m

$815

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 9/1

12:30 am-10:25 am

1 stop19h 55m

Chiang Mai

lun. 9/8

11:35 am-7:30 pm

1 stop21h 55m

$836

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 10/5

1:30 am-10:25 am

1 stop18h 55m

Chiang Mai

mié. 11/19

11:50 am-6:10 pm

1 stop21h 20m

$846

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 10/21

10:15 am-4:40 pm

1 stop40h 25m

Chiang Mai

mar. 11/4

4:35 pm-7:10 am

1 stop53h 35m

$904

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 $842.

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 $1,008 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 August 2025, prices for Seattle to Chiang Mai flights are approximately 45% 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 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 $669Free CancellationRating
8.2
477 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
765 reviews
Search China Airlines flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,352 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $814Free CancellationRating
8.4
1,133 reviews
Search Korean Air flights
EVA AirPriceFrom $870Free CancellationRating
8.4
1,234 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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