$530 Cheap Flights from Washington (IAD) to Chiang Mai (CNX)

View $530 flight on Mon, Apr 20, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)

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

Prices were available within the past 7 days and start at $530 for one-way flights and $950 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All Nippon Airways
Wed, Apr 8 - Wed, Apr 15
IAD
Washington
CNX
Chiang Mai
$950 Roundtrip, found 3 days ago
$950
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Wed, Apr 8 from Washington to Chiang Mai, returning Wed, Apr 15, priced at $950 found 3 days ago
All Nippon Airways
Wed, Apr 15 - Sat, Apr 25
IAD
Washington
CNX
Chiang Mai
$955 Roundtrip, found 2 days ago
$955
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Wed, Apr 15 from Washington to Chiang Mai, returning Sat, Apr 25, priced at $955 found 2 days ago
All Nippon Airways
Wed, Jan 21 - Thu, Jan 29
IAD
Washington
CNX
Chiang Mai
$990 Roundtrip, found 4 days ago
$990
Roundtrip
found 4 days ago
Select All Nippon Airways flight, departing Wed, Jan 21 from Washington to Chiang Mai, returning Thu, Jan 29, priced at $990 found 4 days ago
Air China
Tue, Nov 25 - Mon, Dec 8
IAD
Washington
CNX
Chiang Mai
$992 Roundtrip, found 11 hours ago
$992
Roundtrip
found 11 hours ago
Select Air China flight, departing Tue, Nov 25 from Washington to Chiang Mai, returning Mon, Dec 8, priced at $992 found 11 hours ago
All Nippon Airways
Fri, Jan 23 - Sat, Jan 31
IAD
Washington
CNX
Chiang Mai
$994 Roundtrip, found 4 days ago
$994
Roundtrip
found 4 days ago
Select All Nippon Airways flight, departing Fri, Jan 23 from Washington to Chiang Mai, returning Sat, Jan 31, priced at $994 found 4 days ago
All Nippon Airways
Tue, Jan 27 - Sat, Jan 31
IAD
Washington
CNX
Chiang Mai
$1,005 Roundtrip, found 5 days ago
$1,005
Roundtrip
found 5 days ago
Select All Nippon Airways flight, departing Tue, Jan 27 from Washington to Chiang Mai, returning Sat, Jan 31, priced at $1,005 found 5 days ago
Delta
Mon, Feb 23 - Wed, Mar 11
IAD
Washington
CNX
Chiang Mai
$1,028 Roundtrip, found 4 days ago
$1,028
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Feb 23 from Washington to Chiang Mai, returning Wed, Mar 11, priced at $1,028 found 4 days ago
Korean Air
Mon, Nov 24 - Wed, Dec 10
IAD
Washington
CNX
Chiang Mai
$1,036 Roundtrip, found 11 hours ago
$1,036
Roundtrip
found 11 hours ago
Select Korean Air flight, departing Mon, Nov 24 from Washington to Chiang Mai, returning Wed, Dec 10, priced at $1,036 found 11 hours ago
STARLUX Airlines
Tue, Apr 21 - Tue, May 12
IAD
Washington
CNX
Chiang Mai
$1,042 Roundtrip, found 6 days ago
$1,042
Roundtrip
found 6 days ago
Select STARLUX Airlines flight, departing Tue, Apr 21 from Washington to Chiang Mai, returning Tue, May 12, priced at $1,042 found 6 days ago
Korean Air
Mon, Nov 24 - Mon, Dec 8
IAD
Washington
CNX
Chiang Mai
$1,047 Roundtrip, found 11 hours ago
$1,047
Roundtrip
found 11 hours ago
Select Korean Air flight, departing Mon, Nov 24 from Washington to Chiang Mai, returning Mon, Dec 8, priced at $1,047 found 11 hours ago

Alternative airports near Chiang Mai

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Chiang Mai Intl. CNX. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $1,135
CNX
Chiang Mai Intl.
CheapestClosest
Average driving time to city center10 min
Flights from $1,135

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX) cost?
Grab a cheap one-way flight from $530 or cheap return flight from $950 from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)?
Planning your getaway for April can help you save, as it's the cheapest month for flights between IAD and CNX. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)?
To find the cheapest airline flying from IAD to CNX, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)?
Nonstop flights from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to CNX?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)?
To avoid potential delays on the Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of cancellation.**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 Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX) last-minute?
Booking your plane ticket from IAD to CNX just before your trip is usually more expensive. However, if you're flexible with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an IAD to CNX flight and hotel package?
Opting for an IAD to CNX flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our impressive range of hotels and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Chiang Mai Intl. Airport (CNX)?
If you reserved your IAD to CNX 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 fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Chiang Mai Intl.
Airlines serving
Air China, Austrian Airlines, Delta, Emirates, Etihad Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, STARLUX Airlines, Swiss International Air Lines, Turkish Airlines
Roundtrip price
$950
Distance
8441 mi

Book with confidence

Washington to Chiang Mai Flights

The cheapest times to fly from Washington to Chiang Mai

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

 

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

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

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 Washington to Chiang Mai in 2025. You can also book with separate airlines for your outbound and return journeys, from $530 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 Washington to Chiang Mai 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 Washington to Chiang Mai 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.

 

Washington to Chiang Mai Flights

Explore a world of travel with Expedia

*Available to One Key members.