WAS - CNX

$514 Find Cheap Flights from Washington, D.C. to Chiang Mai

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Chiang Mai departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chiang Mai

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Chiang Mai, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Chiang Mai, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$971
Multiple Airlines
Mon 5/4Mon 5/11
IAD - CNX • 2 stops
Cheapest one-way
$514
Multiple Airlines
Fri 8/21
IAD - CNX • 2 stops
Top airlines
Cheapest • from $1,018 (round-trip)
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Chiang Mai. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $922 (round-trip)
Shortest trip • 21h 35m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chiang Mai!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Chiang Mai (WAS-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Chiang Mai that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Chiang Mai

Mon, May 4 - Mon, May 11
Multiple Airlines Logo
3:10 pm - 8:20 pm
IAD
-
CNX
42h 10m
2 stops
Multiple Airlines Logo
2:25 pm - 9:45 am
CNX
-
IAD
30h 20m
2 stops
$971Multiple Airlines
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
3:10 pm - 1:40 pm
IAD
-
CNX
35h 30m
2 stops
Multiple Airlines Logo
3:30 pm - 9:45 am
CNX
-
IAD
29h 15m
2 stops
$1,010Multiple Airlines
Mon, Aug 31 - Mon, Nov 30
EVA Air Logo
1:50 am - 10:25 am
IAD
-
CNX
21h 35m
1 stop
EVA Air Logo
7:45 pm - 8:55 pm
CNX
-
IAD
61h 10m
2 stops
$1,018EVA Air
Tue, Sep 1 - Mon, Nov 30
Multiple Airlines Logo
5:38 pm - 10:20 am
IAD
-
CNX
29h 42m
2 stops
Multiple Airlines Logo
11:25 am - 11:59 pm
CNX
-
IAD
48h 34m
2 stops
$1,036Multiple Airlines
Fri, Sep 4 - Sat, Oct 3
EVA Air Logo
1:15 am - 10:25 am
IAD
-
CNX
22h 10m
1 stop
EVA Air Logo
11:35 am - 10:00 pm
CNX
-
IAD
21h 25m
1 stop
$1,046EVA Air
Fri, Sep 4 - Sat, Oct 3
EVA Air Logo
1:15 am - 10:25 am
IAD
-
CNX
22h 10m
1 stop
EVA Air Logo
8:00 pm - 10:00 pm
CNX
-
IAD
61h 00m
2 stops
$1,057EVA Air
Fri, Sep 4 - Sat, Oct 3
EVA Air Logo
1:15 am - 7:10 pm
IAD
-
CNX
30h 55m
2 stops
EVA Air Logo
8:00 pm - 10:00 pm
CNX
-
IAD
61h 00m
2 stops
$1,094EVA Air
Sat, Aug 8 - Thu, Sep 3
Multiple Airlines Logo
1:50 am - 10:25 am
IAD
-
CNX
21h 35m
1 stop
Multiple Airlines Logo
11:35 am - 7:28 am
CNX
-
IAD
30h 53m
2 stops
$1,113Multiple Airlines
Sun, Aug 9 - Thu, Sep 3
China Airlines Logo
6:59 pm - 10:20 am
DCA
-
CNX
28h 21m
2 stops
China Airlines Logo
11:20 am - 4:08 pm
CNX
-
DCA
39h 48m
2 stops
$1,275China Airlines
Sun, May 3 - Sun, May 10
China Airlines Logo
8:00 am - 10:20 am
DCA
-
CNX
39h 20m
2 stops
China Airlines Logo
11:20 am - 5:59 pm
CNX
-
DCA
41h 39m
2 stops
$1,295China Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Chiang Mai flights

Get data-powered insights and trends into flights from Washington, D.C. to Chiang Mai to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Chiang Mai?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Chiang Mai were found on EVA Air ($1,018) and Etihad Airways ($1,242).

Good to know

Cheapest flight$514
Most popular time to fly and prices are also 22% lower on average.
Flight from Washington Dulles Airport to Chiang Mai

When to book flights from Washington, D.C. to Chiang Mai

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Chiang Mai

  • What is the cheapest flight from Washington, D.C. to Chiang Mai?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Chiang Mai was $514 for a one-way ticket and $971 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Chiang Mai?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington, D.C. and on arrival in Chiang Mai.

  • Which airports will I be using when flying from Washington, D.C. to Chiang Mai?

    There are 2 airports in Washington, D.C. (Washington, D.C. Reagan-National and Washington, D.C. Dulles Intl.) and only 1 airport in Chiang Mai (Chiang Mai). The cheapest flights are generally found on the Washington Dulles Airport to Chiang Mai flight route.

  • Which aircraft models fly most regularly from Washington, D.C. to Chiang Mai?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Chiang Mai?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Washington, D.C. and Chiang Mai, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Chiang Mai, Korean Air or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Chiang Mai are Korean Air and Delta. With an average price for the route of $1,230 and an overall rating of 8.4, Korean Air is the most popular choice. Delta is also a great choice for the route, with an average price of $1,128 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Chiang Mai?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Chiang Mai?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chiang Mai from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Chiang Mai?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chiang Mai with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Chiang Mai?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chiang Mai from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Washington, D.C. to Chiang Mai

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Chiang Mai. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Chiang Mai? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1202 reviews
8.3Comfort
8.7Crew
8.5Boarding
8.1Food
8.2Entertainment
Airline reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

10.0 ExcellentVivian, Nov 2025
SEA - ICN
Read more Korean Air reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

Korean are so racist and when I ask question or directions they totally ignore me and say racist. Also they give me an rude attitude.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

Entertainment is ok! Boarding and seat with zone is terrible. I paid for the seats but you didn’t give me what I paid for which is exit isles.

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

This was a Latam operated flight. Seats seemed a bit narrow in business class. Older aircraft.

I had a flight cancel and had it rerouted. When the rerouted they put me at a window seat instead of an isle. It was hard sitting by the window because the couple with masks on were making out. I get motion sickness which is why I need to have the isle seat.

NEVER MADE THE FLIGHT BECAUSE DELTA SAID THEY CAN NOT

THEY FAILED ME AND I NEVER GOT ON THE FLIGHT BECAUSE IT WAS SO DELAYED! I ENDED UP HAVING TO PAY OUT OF POCKET FOR A HOTEL AND STAY IN NASHVILLE TO CATCH A FLIGHT FOR THE FOLLOWING DAY. DELTA IS POOR CUSTOMER SERVICE>

Everything you need to know for your flight from Washington, D.C. to Chiang Mai

Information on your arrival and departure airports