WAS - CNX

$505 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 8/5. 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
$1,093
Typical prices: $651-$1,332
Multiple Airlines
Thu 10/15Wed 10/21
IAD - CNX • 2 stops
Cheapest one-way
$505
Multiple Airlines
Wed 8/5
IAD - CNX • 2 stops
Top airlines
Cheapest • from $1,197 (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
When to travel
Cheapest • 38% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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

Thu, Oct 15 - Wed, Oct 21
Multiple Airlines Logo
9:00 pm - 5:55 pm
IAD
-
CNX
33h 55m
2 stops
Multiple Airlines Logo
5:40 pm - 3:40 pm
CNX
-
IAD
33h 00m
2 stops
$1,093Multiple Airlines
Wed, Sep 30 - Thu, Oct 8
Multiple Airlines Logo
9:00 pm - 1:45 pm
IAD
-
CNX
29h 45m
2 stops
Multiple Airlines Logo
10:10 am - 8:55 am
CNX
-
IAD
33h 45m
2 stops
$1,122Multiple Airlines
Sun, Nov 1 - Mon, Nov 16
Multiple Airlines Logo
10:40 am - 7:00 pm
IAD
-
CNX
44h 20m
2 stops
Multiple Airlines Logo
9:05 pm - 3:55 pm
CNX
-
IAD
30h 50m
2 stops
$1,128Multiple Airlines
Thu, Sep 24 - Wed, Oct 14
Multiple Airlines Logo
9:00 pm - 7:10 pm
IAD
-
CNX
35h 10m
2 stops
Multiple Airlines Logo
1:40 pm - 8:45 am
CNX
-
IAD
30h 05m
2 stops
$1,129Multiple Airlines
Thu, Sep 24 - Wed, Oct 14
Multiple Airlines Logo
9:00 pm - 7:10 pm
IAD
-
CNX
35h 10m
2 stops
Multiple Airlines Logo
1:40 pm - 8:45 am
CNX
-
IAD
30h 05m
2 stops
$1,130Multiple Airlines
Mon, Sep 7 - Fri, Sep 18
Multiple Airlines Logo
9:00 pm - 4:15 pm
IAD
-
CNX
32h 15m
2 stops
Multiple Airlines Logo
8:00 pm - 3:40 pm
CNX
-
IAD
30h 40m
2 stops
$1,132Multiple Airlines
Thu, Sep 24 - Wed, Oct 14
Multiple Airlines Logo
9:00 pm - 7:10 pm
IAD
-
CNX
35h 10m
2 stops
Multiple Airlines Logo
9:10 pm - 3:40 pm
CNX
-
IAD
29h 30m
2 stops
$1,174Multiple Airlines
Sun, Nov 1 - Mon, Nov 16
Multiple Airlines Logo
10:30 am - 11:20 am
IAD
-
CNX
36h 50m
2 stops
Multiple Airlines Logo
9:05 pm - 3:55 pm
CNX
-
IAD
30h 50m
2 stops
$1,177Multiple Airlines
Mon, Aug 10 - Wed, Sep 9
Multiple Airlines Logo
9:00 pm - 11:15 am
IAD
-
CNX
27h 15m
2 stops
Multiple Airlines Logo
3:30 pm - 8:45 am
CNX
-
IAD
28h 15m
2 stops
$1,182Multiple Airlines
Sun, Nov 8 - Wed, Nov 11
Korean Air Logo
5:00 pm - 10:55 pm
DCA
-
CNX
41h 55m
2 stops
Korean Air Logo
12:15 am - 2:38 pm
CNX
-
DCA
26h 23m
2 stops
$1,197Korean Air
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.

What is the cheapest month to fly from Washington, D.C. to Chiang Mai?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Chiang Mai is October, where tickets cost $651 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $1,489 and $1,438 respectively.

Good to know

Cheapest flight$505
Most popular time to fly and prices are also 20% 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 5 days, the lowest price for a flight from Washington, D.C. to Chiang Mai was $505 for a one-way ticket and $1,093 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 $1,173 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 7.8.

  • 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 1218 reviews
8.5Boarding
8.2Entertainment
8.7Crew
8.3Comfort
8.1Food
Airline reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

8.0 ExcellentCarlos J, Apr 2026
TPA - ATL
Read more Korean Air reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

Lousy entertainment system. Crews are excellent. Meal is just mediocre.

Great service and comfort level. You can have more of vegetarian food options.

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.

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!

Very good flight. Crew was great. No issues and we even arrived early.

The flights are constantly late anymore, and they won't even give you a glass of water on the plane. For years, they were able to do a service on this flight from Atlanta to Knoxville and Knoxville Atlanta now they say it's too short of a flight. You can't even get a quick drink of water.

Flight got canceled 4 times, missed my connecting flight due to delays, have to wait to go home tomorrow

Third flight in two months where the crew was not there. Comfort seating does not guarantee overhead bin space. Passengers with children are allowed on the plane first - if you are flying to and from Orlando, this means half the plane has boarded before you get on. And somehow all the bin space is taken up. 3 out of 5 flights have had issues with equipment or procedure. Some of these instances caused the flight to be delayed because of a "nuisance" light. One time it was a bag that had been brought on board but did not belong to anyone so we had to return to the gate. Last night we were told the "AC" on the plane doesn't work well and we're 10th for take off- because the crew was late - and that it will get cool when we're in the air. Not sure if this is usual, but I didn't think flight crew could jump seat in first class. Movie and TV selection has not been refreshed for several months- flying one to two round trips each month easily exhausts the list of content.

Great experience nice pilot very soft and easy landing and take off

We sat on the runway for over an hour before departure. That was unwelcome.

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

Flight was delayed before take off and at landing. Baggage took 20 minutes. Flight crew would not serve full soft drink and had to ask multiple times before receiving water.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

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

Information on your arrival and departure airports