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Cheap flights from Seattle to Chiang Mai from $385

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 3/20. 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.
China Airlines Logo
1:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pmCNX-SEA
21h 45m1 stop
$767China Airlines
Find Deal
mar., oct. 28 - mar., ene. 20
Multiple Airlines Logo
1:15 am - 4:20 pmSEA-CNX
25h 05m1 stop
Multiple Airlines Logo
10:10 am - 3:05 pmCNX-SEA
19h 55m2 stops
$788Multiple Airlines
Find Deal
dom., oct. 19 - mar., nov. 4
Multiple Airlines Logo
11:45 pm - 9:00 pmSEA-CNX
30h 15m2 stops
Multiple Airlines Logo
11:55 am - 4:10 pmCNX-SEA
42h 15m2 stops
$801Multiple Airlines
Find Deal
vie., ene. 9 - dom., may. 3
Korean Air Logo
11:00 am - 10:55 pmSEA-CNX
20h 55m1 stop
Korean Air Logo
12:15 am - 9:00 amCNX-SEA
23h 45m1 stop
$806Korean Air
Find Deal
lun., nov. 17 - dom., dic. 7
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
$809EVA Air
Find Deal
mar., nov. 18 - jue., dic. 4
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
$810China Airlines
Find Deal
mar., nov. 18 - sáb., dic. 6
Korean Air Logo
7:59 pm - 10:55 pmSEA-CNX
35h 56m2 stops
Korean Air Logo
12:15 am - 9:00 amCNX-SEA
23h 45m1 stop
$811Korean Air
Find Deal
dom., nov. 16 - dom., dic. 7
EVA Air Logo
12:10 am - 10:35 amSEA-CNX
19h 25m1 stop
EVA Air Logo
11:35 am - 7:30 pmCNX-SEA
21h 55m1 stop
$847EVA Air
Find Deal
dom., ene. 11 - vie., may. 29
STARLUX Airlines Logo
1:15 am - 4:20 pmSEA-CNX
25h 05m1 stop
STARLUX Airlines Logo
4:55 pm - 4:05 pmCNX-SEA
37h 10m1 stop
$878STARLUX Airlines
Find Deal
dom., oct. 19 - jue., oct. 30
STARLUX Airlines Logo
1:15 am - 4:20 pmSEA-CNX
25h 05m1 stop
STARLUX Airlines Logo
4:55 pm - 4:05 pmCNX-SEA
37h 10m1 stop
$898STARLUX Airlines
Find Deal
dom., oct. 19 - sáb., nov. 1

China Airlines flights from Seattle to Chiang Mai

Our best China Airlines deals on Seattle to Chiang Mai flight tickets
China Airlines
Oct 28
SEA1:10 amSeattle/Tacoma Intl
19h 15m
1 stop
CNX10:25 amChiang Mai
Jan 20
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$767
Find similar
China Airlines
Nov 18
SEA12:10 amSeattle/Tacoma Intl
19h 15m
1 stop
CNX10:25 amChiang Mai
Dec 6
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$810
Find similar
China Airlines
Nov 17
SEA12:10 amSeattle/Tacoma Intl
19h 15m
1 stop
CNX10:25 amChiang Mai
Dec 6
CNX11:25 amChiang Mai
21h 45m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$821
Find similar

Korean Air flights from Seattle to Chiang Mai

Our best Korean Air deals on Seattle to Chiang Mai flight tickets
Korean Air
Nov 17
SEA11:00 amSeattle/Tacoma Intl
20h 55m
1 stop
CNX10:55 pmChiang Mai
Dec 7
CNX12:15 amChiang Mai
23h 45m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$806
Find similar
Korean Air
Nov 16
SEA7:59 pmSeattle/Tacoma Intl
35h 56m
2 stops
CNX10:55 pmChiang Mai
Dec 7
CNX12:15 amChiang Mai
23h 45m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$811
Find similar
Korean Air
Nov 17
SEA11:00 amSeattle/Tacoma Intl
20h 55m
1 stop
CNX10:55 pmChiang Mai
Dec 6
CNX12:15 amChiang Mai
31h 06m
2 stops
SEA4:21 pmSeattle/Tacoma Intl
$817
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 octubre 14, 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

mar. 10/28

1:10 am-10:25 am

1 stop19h 15m

Chiang Mai

mar. 1/20

11:25 am-6:10 pm

1 stop21h 45m

$767

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 10/19

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

mar. 11/4

10:10 am-3:05 pm

2 stops19h 55m

$788

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

vie. 1/9

11:45 pm-9:00 pm

2 stops30h 15m

Chiang Mai

dom. 5/3

11:55 am-4:10 pm

2 stops42h 15m

$801

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

lun. 11/17

11:00 am-10:55 pm

1 stop20h 55m

Chiang Mai

dom. 12/7

12:15 am-9:00 am

1 stop23h 45m

$806

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 11/18

11:30 pm-10:35 am

1 stop20h 05m

Chiang Mai

jue. 12/4

11:50 am-6:10 pm

1 stop21h 20m

$809

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 11/18

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

sáb. 12/6

11:25 am-6:10 pm

1 stop21h 45m

$810

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 11/16

7:59 pm-10:55 pm

2 stops35h 56m

Chiang Mai

dom. 12/7

12:15 am-9:00 am

1 stop23h 45m

$811

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 1/11

12:10 am-10:35 am

1 stop19h 25m

Chiang Mai

vie. 5/29

11:35 am-7:30 pm

1 stop21h 55m

$847

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 10/19

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

jue. 10/30

4:55 pm-4:05 pm

1 stop37h 10m

$878

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 10/19

1:15 am-4:20 pm

1 stop25h 05m

Chiang Mai

sáb. 11/1

4:55 pm-4:05 pm

1 stop37h 10m

$898

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 $987 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 October 2025, prices for Seattle to Chiang Mai flights are approximately 40% 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 $663Free CancellationRating
8.2
486 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
768 reviews
Search China Airlines flights
Singapore AirlinesPriceFrom $768Free CancellationRating
8.1
1,379 reviews
Search Singapore Airlines flights
Korean AirPriceFrom $814Free CancellationRating
8.4
1,149 reviews
Search Korean Air flights
EVA AirPriceFrom $865Free CancellationRating
8.4
1,250 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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