SEA - CNX

$388 Find Cheap Flights from Seattle to Chiang Mai - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Chiang Mai departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$832
Typical prices: $901-$1,108
China Airlines
Sun 9/27Tue 10/13
SEA - CNX • 1 stop
Cheapest one-way
$388
Typical prices: $444-$563
Multiple Airlines
Wed 9/30
SEA - CNX • 2 stops
Top airlines
Cheapest • from $832 (round-trip)
Best reviews • 8.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Chiang Mai. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $1,306 (round-trip)
Shortest trip • 19h 21m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chiang Mai!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Chiang Mai (SEA-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Chiang Mai that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Chiang Mai

Sun, Sep 27 - Tue, Oct 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
$832China Airlines
Mon, Sep 7 - Tue, Sep 15
China Airlines Logo
1:55 am - 10:20 am
SEA
-
CNX
18h 25m
1 stop
China Airlines Logo
11:20 am - 7:45 pm
CNX
-
SEA
22h 25m
1 stop
$840China Airlines
Sun, Sep 27 - Tue, Oct 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
$840China Airlines
Sat, Aug 22 - Tue, Sep 8
China Airlines Logo
1:55 am - 10:20 am
SEA
-
CNX
18h 25m
1 stop
China Airlines Logo
11:20 am - 7:45 pm
CNX
-
SEA
22h 25m
1 stop
$845China Airlines
Mon, Nov 2 - Sun, Nov 15
Korean Air Logo
11:00 am - 10:55 pm
SEA
-
CNX
20h 55m
1 stop
Korean Air Logo
12:15 am - 9:00 am
CNX
-
SEA
23h 45m
1 stop
$868Korean Air
Wed, Nov 4 - Sat, Nov 7
Korean Air Logo
11:00 am - 10:55 pm
SEA
-
CNX
20h 55m
1 stop
Korean Air Logo
12:15 am - 9:00 am
CNX
-
SEA
23h 45m
1 stop
$868Korean Air
Mon, Nov 9 - Sun, Dec 6
Korean Air Logo
11:00 am - 10:55 pm
SEA
-
CNX
20h 55m
1 stop
Korean Air Logo
12:15 am - 9:00 am
CNX
-
SEA
23h 45m
1 stop
$868Korean Air
Tue, Sep 29 - Wed, Oct 7
EVA Air Logo
12:30 am - 10:25 am
SEA
-
CNX
19h 55m
1 stop
EVA Air Logo
11:35 am - 7:20 pm
CNX
-
SEA
21h 45m
1 stop
$893EVA Air
Tue, Oct 6 - Thu, Oct 15
EVA Air Logo
1:30 am - 10:25 am
SEA
-
CNX
18h 55m
1 stop
EVA Air Logo
11:35 am - 7:20 pm
CNX
-
SEA
21h 45m
1 stop
$894EVA Air
Mon, Nov 23 - Wed, Dec 2
EVA Air Logo
12:10 am - 10:35 am
SEA
-
CNX
19h 25m
1 stop
EVA Air Logo
11:50 am - 6:10 pm
CNX
-
SEA
21h 20m
1 stop
$898EVA Air
Booking Insights

KAYAK's insights & trends for Seattle to Chiang Mai flights

Get data-powered insights and trends into flights from Seattle to Chiang Mai to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Chiang Mai?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Chiang Mai departing in September.

Flight prices are below average for this route right now.

Flights to Chiang Mai from Seattle usually cost between $834 and $1,240 in September.
The lowest price found in the past 5 days was $832 on China Airlines (Sep 27-Oct 13).

What is the cheapest month to fly from Seattle to Chiang Mai?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Chiang Mai is February, where tickets cost $813 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,664 and $1,444 respectively.

How far in advance should I book a flight from Seattle to Chiang Mai?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Chiang Mai, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low season

July

Cheapest flight

$388
Best time to beat the crowds but there is an average 19% increase in price.
Most popular time to fly with an average 50% increase in price.
Flight from Seattle to Chiang Mai

When to book flights from Seattle to Chiang Mai

Are your dates flexible? Find out the best times to travel from Seattle to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Chiang Mai

  • What is the cheapest flight from Seattle to Chiang Mai?

    In the last 5 days, the lowest price for a flight from Seattle to Chiang Mai was $388 for a one-way ticket and $832 for a round-trip.

  • Do I need a passport to fly between Seattle and Chiang Mai?

    A passport is required to fly from Seattle to Chiang Mai.

  • Which aircraft models fly most regularly from Seattle to Chiang Mai?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Chiang Mai?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Chiang Mai, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Chiang Mai from Seattle?

    Seoul is the most popular layover city among KAYAK users traveling from Seattle to Chiang Mai.

  • Which is the best airline for flights from Seattle to Chiang Mai, EVA Air or China Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Chiang Mai are EVA Air and China Airlines. With an average price for the route of $990 and an overall rating of 8.5, EVA Air is the most popular choice. China Airlines is also a great choice for the route, with an average price of $856 and an overall rating of 8.3.

  • How does KAYAK find such low prices on flights from Seattle to Chiang Mai?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Chiang Mai?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chiang Mai from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Chiang Mai?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chiang Mai with an airline and back to Seattle with another airline. Booking your flights between Seattle and CNX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Chiang Mai?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chiang Mai from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Seattle to Chiang Mai

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Chiang Mai. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Chiang Mai? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.5
EVA AirOverall score based on 1506 reviews
8.4Boarding
8.0Entertainment
8.7Crew
8.1Food
8.3Comfort
Airline reviews

They forced me to check a bag. When Kayak sold me these tickets I was not informed of carry on baggage weight limits.

4.0 OkayAnonymous, Jun 2026
SEA - TPE
Read more EVA Air reviews

They forced me to check a bag. When Kayak sold me these tickets I was not informed of carry on baggage weight limits.

The food was great; the attendants were pleasant. Waiting to onboard felt stressful, as passengers who had connecting flights at SEA had to be verified again for two things before getting a real boarding pass: passport and carry-on luggage weight. The boarding pass issued by another airline (i.e., the first leg of my trip) did not count. The S terminal at SEA was barren, with lots of sensory overloads because every airline was repeatedly broadcasting long lists of names of passengers who had not gone through that verification process. The carry-on luggage weight check seemed futile to me. I saw a woman who opened her over-weight suitcase to move some items into her shoulder bag. She still boarded with two huge bags with her. I assume this check is an endeavor of ensuring fairness of the overhead bin space or optimizing fuel efficiency when gas price is through the roof, but I don't know if either goal is achieved. Nonetheless I respect the crew's dedication to the SOP.

The crew need to be more friendly it seem everything such a rush situation during dinner and breakfast. Smiles to the passenger go such a long way just the service from Seattle to Taipei, service from Taipei to Bangkok were great more pleasant the flight attendant from Thailand she was very nice, as far as entertainment were amazing , wiffi connection was incredible great, I will be able to charged my phone from Seattle to Taipei and from taipei to Bangkok I won’t be able to do so flight attendant told me that because I don’t have the original iPhone charger connection has nothing to do what type of charger I have so she said there is nothing she can do about it. Foods : from Seattle to Taipei were ok no flavor , from Taipei to Bangkok I have chicken teriyaki the rice is overcooked all the flavor stuck on the aluminum wraps , breakfast the congee was on point and delicious. Will I recommend anyone to fly with Eva air go for it so you can experience yourself for myself I won’t fly with them again I’m gonna stick with Singapore airlines instead.

Never went. Got rescheduled with Phillipine Airlines to Bali, which was fine.

The flight from SEA to Taipei was on a Boeing 787-10. Economy seats were unacceptably cramped and the seats themselves were old and lacking cushion. I'm only 5'3" and couldn't cross my legs as my knees were up against the seat in front of me! I could not get WiFi to work most of the time on both flights and crew were invisible except to serve meals. The onboard entertainment also did not work reliably and was very hard to hear through the provided earbuds. The Asian vegetarian meals were interesting. I hope they can provide a fully vegan option though these meals seemed to be already. I appreciate their providing these meals options for vegans. I don't think I'll fly a 787-10 if I can help it. It was the definition of a sardine can in Economy.

Amazing one of the best airlines i have ever traveled with. I live with medical issues called psoriatic arthritis and was in pain on the flight. The flight crew made sure I had fresh ice pack ever hour. Going above an beyond with service and care ⭐️⭐️⭐️⭐️⭐️.

The crews are very efficient. Other airlines should learn from them when it comes to boarding and departing from the airplane. They also display efficiency in serving meals. They don't keep the aisles blocked for hours like some other airlines. The food is poor. Generally the food was unrecognizable and poorly prepared. The only thing that made it better than US flag carriers is that there was a fresh fruit bowl with each meal.

Great experience, comfort and food is delicious. Always great service and one time

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

We were not sat together for the longeset duration of our travel very uncomfortable didnt enjoy that they fed us at 2 am

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I did not like how the plane landed. It was not smooth.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

Lovely service and excellent food and entertainment! I couldn’t have been more happy flying with air China

Everything you need to know for your flight from Seattle to Chiang Mai

Information on your arrival and departure airports