$547 Cheap Flights from Chiang Mai (CNX) to Washington (IAD)

View $547 flight on Wed, Sep 24, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $547 for one-way flights and $1,123 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Wed, Mar 18 - Tue, Jul 28
CNX
Chiang Mai
IAD
Washington
$1,123 Roundtrip, found 4 days ago
$1,123
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Wed, Mar 18 from Chiang Mai to Washington, returning Tue, Jul 28, priced at $1,123 found 4 days ago
EVA Airways
Fri, Sep 12 - Wed, Sep 24
CNX
Chiang Mai
IAD
Washington
$1,123 Roundtrip, found 7 hours ago
$1,123
Roundtrip
found 7 hours ago
Select EVA Airways flight, departing Fri, Sep 12 from Chiang Mai to Washington, returning Wed, Sep 24, priced at $1,123 found 7 hours ago
EVA Airways
Tue, Jan 20 - Sun, Feb 1
CNX
Chiang Mai
IAD
Washington
$1,135 Roundtrip, found 2 hours ago
$1,135
Roundtrip
found 2 hours ago
Select EVA Airways flight, departing Tue, Jan 20 from Chiang Mai to Washington, returning Sun, Feb 1, priced at $1,135 found 2 hours ago
China Airlines
Sat, Sep 20 - Mon, Oct 20
CNX
Chiang Mai
IAD
Washington
$1,158 Roundtrip, found 5 hours ago
$1,158
Roundtrip
found 5 hours ago
Select China Airlines flight, departing Sat, Sep 20 from Chiang Mai to Washington, returning Mon, Oct 20, priced at $1,158 found 5 hours ago
Jeju Air
Tue, Oct 14 - Wed, Mar 11
CNX
Chiang Mai
IAD
Washington
$1,161 Roundtrip, found 7 hours ago
$1,161
Roundtrip
found 7 hours ago
Select Jeju Air flight, departing Tue, Oct 14 from Chiang Mai to Washington, returning Wed, Mar 11, priced at $1,161 found 7 hours ago
Jeju Air
Tue, Oct 14 - Wed, Mar 11
CNX
Chiang Mai
IAD
Washington
$1,165 Roundtrip, found 7 hours ago
$1,165
Roundtrip
found 7 hours ago
Select Jeju Air flight, departing Tue, Oct 14 from Chiang Mai to Washington, returning Wed, Mar 11, priced at $1,165 found 7 hours ago
Jeju Air
Tue, Oct 14 - Wed, Mar 11
CNX
Chiang Mai
IAD
Washington
$1,167 Roundtrip, found 7 hours ago
$1,167
Roundtrip
found 7 hours ago
Select Jeju Air flight, departing Tue, Oct 14 from Chiang Mai to Washington, returning Wed, Mar 11, priced at $1,167 found 7 hours ago
China Airlines
Tue, Oct 14 - Thu, Mar 12
CNX
Chiang Mai
IAD
Washington
$1,170 Roundtrip, found 19 hours ago
$1,170
Roundtrip
found 19 hours ago
Select China Airlines flight, departing Tue, Oct 14 from Chiang Mai to Washington, returning Thu, Mar 12, priced at $1,170 found 19 hours ago
Asiana Airlines
Wed, Sep 24 - Sun, Sep 28
CNX
Chiang Mai
IAD
Washington
$1,182 Roundtrip, found 4 days ago
$1,182
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Wed, Sep 24 from Chiang Mai to Washington, returning Sun, Sep 28, priced at $1,182 found 4 days ago
Swiss International Air Lines
Mon, Sep 15 - Mon, Sep 22
CNX
Chiang Mai
IAD
Washington
$1,185 Roundtrip, found 1 day ago
$1,185
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Sep 15 from Chiang Mai to Washington, returning Mon, Sep 22, priced at $1,185 found 1 day ago

Find the cheapest month to fly from Chiang Mai (CNX) to Washington (IAD)

October is typically the cheapest month to fly

From $1,015 - $1,629 per traveler.

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $1,158
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $1,158
Flights from Chiang Mai (CNX) to Washington (IAD)
Origin airport
Chiang Mai Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Air China, Asiana Airlines, Austrian Airlines, Delta, Etihad Airways, KLM, Korean Air, Lufthansa, Qatar Airways, Swiss International Air Lines
Roundtrip price
$1,122
Distance
8441 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 March. 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 $547 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 Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $547 or cheap return flight from $1,123 from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD) 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 Washington Dulles Intl. Airport (IAD)?
Flying in March can help you save, as it's the cheapest month for flights between CNX and IAD. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline that'll fly you from CNX to IAD, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD)?
You'll need to take a flight with a layover when traveling from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from CNX to IAD?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change depending on a range of factors, such as the airline 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 Washington Dulles Intl. Airport (IAD)?
Select a flight from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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 Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from CNX to IAD are typically more expensive. To lock in the best rates, start looking for flights ahead of time. That said, if you're flexible with your travel plans, you may find a cheap fare right before your trip.
Is it cheaper to book a CNX to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a CNX to IAD flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one easy place will take the stress out of travel planning. Simply secure your flights and choose from our extensive range of hotels, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Chiang Mai Intl. Airport (CNX) to Washington Dulles Intl. Airport (IAD)?
In most instances, you can modify or cancel your CNX to IAD flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you need further information, visit our Customer Service portal.

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*Available to One Key members.