$622 Cheap Flights from Chiang Mai (CNX) to Washington (DCA)

View $622 flight on Tue, Oct 14, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $622 for one-way flights and $1,338 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,338 Roundtrip, found 4 hours ago
$1,338
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,338 found 4 hours ago
Delta
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,388 Roundtrip, found 4 hours ago
$1,388
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,388 found 4 hours ago
Korean Air
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,452 Roundtrip, found 4 hours ago
$1,452
Roundtrip
found 4 hours ago
Select Korean Air flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,452 found 4 hours ago
Korean Air
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,453 Roundtrip, found 4 hours ago
$1,453
Roundtrip
found 4 hours ago
Select Korean Air flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,453 found 4 hours ago
Jeju Air
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,461 Roundtrip, found 4 hours ago
$1,461
Roundtrip
found 4 hours ago
Select Jeju Air flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,461 found 4 hours ago
Korean Air
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,474 Roundtrip, found 4 hours ago
$1,474
Roundtrip
found 4 hours ago
Select Korean Air flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,474 found 4 hours ago
Delta
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,476 Roundtrip, found 4 hours ago
$1,476
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,476 found 4 hours ago
Korean Air
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,501 Roundtrip, found 4 hours ago
$1,501
Roundtrip
found 4 hours ago
Select Korean Air flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,501 found 4 hours ago
Asiana Airlines
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,645 Roundtrip, found 4 hours ago
$1,645
Roundtrip
found 4 hours ago
Select Asiana Airlines flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,645 found 4 hours ago
China Airlines
Wed, Oct 22 - Fri, Jan 2
CNX
Chiang Mai
DCA
Washington
$1,676 Roundtrip, found 4 hours ago
$1,676
Roundtrip
found 4 hours ago
Select China Airlines flight, departing Wed, Oct 22 from Chiang Mai to Washington, returning Fri, Jan 2, priced at $1,676 found 4 hours ago
Flights from Chiang Mai (CNX) to Washington (DCA)
Origin airport
Chiang Mai Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Delta, Korean Air
Roundtrip price
$1,338
Distance
8446 mi

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 October. 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 $622 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.

 

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 $622 or cheap return flight from $1,338 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)?
October 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.

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*Available to One Key members.