$658 Cheap Flights from Chiang Mai (CNX) to Washington (DCA)

View $658 flight on Mon, Jan 26, 2026Opens in a new window

Popular airlines from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA)

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Cheap Flights from Chiang Mai to Washington (CNX-DCA)

Prices were available within the past 7 days and start at $658 for one-way flights and $1,286 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Airlines
Sun, Feb 1 - Sun, Mar 8
CNX
Chiang Mai
DCA
Washington
$1,286 Roundtrip, found 5 days ago
$1,286
Roundtrip
found 5 days ago
Select China Airlines flight, departing Sun, Feb 1 from Chiang Mai to Washington, returning Sun, Mar 8, priced at $1,286 found 5 days ago
EVA Airways
Sun, Feb 1 - Sun, Mar 8
CNX
Chiang Mai
DCA
Washington
$1,344 Roundtrip, found 5 days ago
$1,344
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Sun, Feb 1 from Chiang Mai to Washington, returning Sun, Mar 8, priced at $1,344 found 5 days ago
China Airlines
Tue, Apr 7 - Fri, Apr 17
CNX
Chiang Mai
DCA
Washington
$1,361 Roundtrip, found 3 days ago
$1,361
Roundtrip
found 3 days ago
Select China Airlines flight, departing Tue, Apr 7 from Chiang Mai to Washington, returning Fri, Apr 17, priced at $1,361 found 3 days ago
China Airlines
Tue, Apr 7 - Fri, Apr 17
CNX
Chiang Mai
DCA
Washington
$1,403 Roundtrip, found 3 days ago
$1,403
Roundtrip
found 3 days ago
Select China Airlines flight, departing Tue, Apr 7 from Chiang Mai to Washington, returning Fri, Apr 17, priced at $1,403 found 3 days ago
China Airlines
Tue, Apr 7 - Fri, Apr 17
CNX
Chiang Mai
DCA
Washington
$1,415 Roundtrip, found 6 days ago
$1,415
Roundtrip
found 6 days ago
Select China Airlines flight, departing Tue, Apr 7 from Chiang Mai to Washington, returning Fri, Apr 17, priced at $1,415 found 6 days ago
Delta
Wed, Nov 12 - Thu, Nov 13
CNX
Chiang Mai
DCA
Washington
$1,597 Roundtrip, found 3 days ago
$1,597
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Nov 12 from Chiang Mai to Washington, returning Thu, Nov 13, priced at $1,597 found 3 days ago
China Airlines
Tue, Apr 7 - Fri, Apr 17
CNX
Chiang Mai
DCA
Washington
$1,653 Roundtrip, found 6 days ago
$1,653
Roundtrip
found 6 days ago
Select China Airlines flight, departing Tue, Apr 7 from Chiang Mai to Washington, returning Fri, Apr 17, priced at $1,653 found 6 days ago
Korean Air
Wed, Nov 12 - Thu, Nov 13
CNX
Chiang Mai
DCA
Washington
$1,660 Roundtrip, found 3 days ago
$1,660
Roundtrip
found 3 days ago
Select Korean Air flight, departing Wed, Nov 12 from Chiang Mai to Washington, returning Thu, Nov 13, priced at $1,660 found 3 days ago
Korean Air
Wed, Nov 12 - Thu, Nov 13
CNX
Chiang Mai
DCA
Washington
$1,661 Roundtrip, found 3 days ago
$1,661
Roundtrip
found 3 days ago
Select Korean Air flight, departing Wed, Nov 12 from Chiang Mai to Washington, returning Thu, Nov 13, priced at $1,661 found 3 days ago
China Southern Airlines
Tue, Apr 7 - Fri, Apr 17
CNX
Chiang Mai
DCA
Washington
$2,044 Roundtrip, found 6 days ago
$2,044
Roundtrip
found 6 days ago
Select China Southern Airlines flight, departing Tue, Apr 7 from Chiang Mai to Washington, returning Fri, Apr 17, priced at $2,044 found 6 days ago

Frequently asked questions

How much does a flight from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA) cost?
Lock in a cheap one-way flight from $658 or cheap return flight from $1,286 from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA)?
February is the cheapest month to fly from CNX to DCA. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from CNX to DCA. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA)?
Nonstop flights from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CNX to DCA?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*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 Ronald Reagan Washington National Airport (DCA)?
Choose a flight from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**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 Ronald Reagan Washington National Airport (DCA) last-minute?
Last-minute bookings from CNX to DCA are usually more expensive. To secure the best prices, start searching for flights well in advance. That said, if you're flexible with your travel plans, it's possible to land a cheap ticket right before your trip.
Is it cheaper to book a CNX to DCA flight and hotel package?
Opting for a CNX to DCA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our impressive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Chiang Mai Intl. Airport (CNX) to Ronald Reagan Washington National Airport (DCA)?
If you reserved your CNX to DCA flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Travel information

Origin airport
Chiang Mai Intl.
Destination airport
Ronald Reagan Washington National
Roundtrip price
$1,286
Distance
8446 mi

Book with confidence

Chiang Mai to Washington Flights

The cheapest times to fly from Chiang Mai to Washington

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 Washington are during the month of February. You can find some of the cheapest flights from Chiang Mai to Washington with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Chiang Mai to Washington: 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 Washington

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 Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $658 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 Washington 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 Washington 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 Washington Flights

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*Available to One Key members.