$508 Cheap Flights from Chiang Mai (CNX) to Seattle (SEA)

View $508 flight on Thu, Jan 29, 2026Opens in a new window

Popular airlines from Chiang Mai Intl. Airport (CNX) to Seattle-Tacoma International Airport (SEA)

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

Prices were available within the past 7 days and start at $508 for one-way flights and $802 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Wed, Mar 11 - Wed, Mar 18
CNX
Chiang Mai
SEA
Seattle
$802 Roundtrip, found 5 days ago
$802
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Wed, Mar 11 from Chiang Mai to Seattle, returning Wed, Mar 18, priced at $802 found 5 days ago
EVA Airways
Thu, Jan 22 - Wed, Jan 28
CNX
Chiang Mai
SEA
Seattle
$804 Roundtrip, found 5 days ago
$804
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Thu, Jan 22 from Chiang Mai to Seattle, returning Wed, Jan 28, priced at $804 found 5 days ago
Korean Air
Fri, Feb 13 - Sat, Mar 7
CNX
Chiang Mai
SEA
Seattle
$822 Roundtrip, found 1 day ago
$822
Roundtrip
found 1 day ago
Select Korean Air flight, departing Fri, Feb 13 from Chiang Mai to Seattle, returning Sat, Mar 7, priced at $822 found 1 day ago
STARLUX Airlines
Tue, Nov 4 - Thu, Nov 6
CNX
Chiang Mai
SEA
Seattle
$834 Roundtrip, found 6 days ago
$834
Roundtrip
found 6 days ago
Select STARLUX Airlines flight, departing Tue, Nov 4 from Chiang Mai to Seattle, returning Thu, Nov 6, priced at $834 found 6 days ago
Korean Air
Tue, Oct 28 - Mon, Nov 24
CNX
Chiang Mai
SEA
Seattle
$843 Roundtrip, found 6 hours ago
$843
Roundtrip
found 6 hours ago
Select Korean Air flight, departing Tue, Oct 28 from Chiang Mai to Seattle, returning Mon, Nov 24, priced at $843 found 6 hours ago
Korean Air
Wed, Mar 11 - Wed, Mar 18
CNX
Chiang Mai
SEA
Seattle
$844 Roundtrip, found 5 days ago
$844
Roundtrip
found 5 days ago
Select Korean Air flight, departing Wed, Mar 11 from Chiang Mai to Seattle, returning Wed, Mar 18, priced at $844 found 5 days ago
Korean Air
Thu, Jan 22 - Wed, Jan 28
CNX
Chiang Mai
SEA
Seattle
$846 Roundtrip, found 5 days ago
$846
Roundtrip
found 5 days ago
Select Korean Air flight, departing Thu, Jan 22 from Chiang Mai to Seattle, returning Wed, Jan 28, priced at $846 found 5 days ago
EVA Airways
Thu, Jan 22 - Wed, Jan 28
CNX
Chiang Mai
SEA
Seattle
$858 Roundtrip, found 5 days ago
$858
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Thu, Jan 22 from Chiang Mai to Seattle, returning Wed, Jan 28, priced at $858 found 5 days ago
Bangkok Airways
Mon, Nov 17 - Mon, Nov 24
CNX
Chiang Mai
SEA
Seattle
$880 Roundtrip, found 10 hours ago
$880
Roundtrip
found 10 hours ago
Select Bangkok Airways flight, departing Mon, Nov 17 from Chiang Mai to Seattle, returning Mon, Nov 24, priced at $880 found 10 hours ago
China Airlines
Sat, Nov 1 - Mon, Nov 24
CNX
Chiang Mai
SEA
Seattle
$881 Roundtrip, found 6 hours ago
$881
Roundtrip
found 6 hours ago
Select China Airlines flight, departing Sat, Nov 1 from Chiang Mai to Seattle, returning Mon, Nov 24, priced at $881 found 6 hours ago

Frequently asked questions

How much does a flight from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA) cost?
Lock in a cheap one-way flight from $508 or cheap return flight from $802 from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA)?
Planning your trip for March can help you save, as it's the cheapest month for flights between CNX and SEA. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest CNX to SEA flight.
How many flights per day from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA)?
You'll need to hop on a flight with a layover when traveling from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from CNX to SEA?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA)?
To reach Seattle - Tacoma Intl. Airport (SEA) without delays, book a flight that takes off from Chiang Mai Intl. Airport (CNX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from CNX to SEA are typically more expensive. To lock in the lowest prices, start looking for flights as early as possible. That being said, if you're flexible with your travel plans, you may find a cheap ticket just before your departure.
Is it cheaper to book a CNX to SEA flight and hotel package?
You'll generally save money by booking a CNX to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your ideal flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Chiang Mai Intl. Airport (CNX) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, it's possible to cancel or reschedule your CNX to SEA flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Chiang Mai Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
China Airlines, Delta, Lufthansa, Qatar Airways, Singapore Airlines
Roundtrip price
$801
Distance
7194 mi

Book with confidence

Chiang Mai to Seattle Flights

The cheapest times to fly from Chiang Mai to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chiang Mai to Seattle are during the month of March. You can find some of the cheapest flights from Chiang Mai to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chiang Mai to Seattle

Sunday is one of the best days to book for cheap flights from Chiang Mai to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Chiang Mai to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chiang Mai to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $508 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chiang Mai to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chiang Mai to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Chiang Mai to Seattle Flights

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*Available to One Key members.