WAS - CNX

$446 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 2/28. 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
$941
STARLUX Airlines
Tue 4/21Sat 5/9
IAD - CNX • 2 stops
Cheapest one-way
$446
Multiple Airlines
Sat 2/28
BWI - CNX • 3 stops
Top airlines
STARLUX Airlines
Cheapest • from $941 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 23% price drop
January
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

Tue, Apr 21 - Sat, May 9
STARLUX Airlines Logo
7:11 pm - 4:20 pm
IAD
-
CNX
34h 09m
2 stops
STARLUX Airlines Logo
5:20 pm - 5:50 am
CNX
-
IAD
47h 30m
2 stops
$941STARLUX Airlines
Tue, Apr 21 - Sat, May 9
STARLUX Airlines Logo
7:11 pm - 4:20 pm
IAD
-
CNX
34h 09m
2 stops
STARLUX Airlines Logo
5:20 pm - 5:50 am
CNX
-
IAD
47h 30m
2 stops
$960STARLUX Airlines
Mon, Apr 6 - Thu, Apr 16
China Airlines Logo
7:11 pm - 10:20 am
IAD
-
CNX
28h 09m
2 stops
China Airlines Logo
11:20 am - 5:40 am
CNX
-
IAD
29h 20m
2 stops
$996China Airlines
Mon, Mar 2 - Mon, Apr 13
Multiple Airlines Logo
6:27 pm - 10:25 am
IAD
-
CNX
27h 58m
2 stops
Multiple Airlines Logo
11:20 am - 5:40 am
CNX
-
IAD
29h 20m
2 stops
$1,014Multiple Airlines
Mon, Mar 2 - Mon, Apr 13
China Airlines Logo
6:27 pm - 10:25 am
IAD
-
CNX
27h 58m
2 stops
China Airlines Logo
11:20 am - 5:40 am
CNX
-
IAD
29h 20m
2 stops
$1,024China Airlines
Fri, Mar 13 - Sat, Mar 28
Etihad Airways Logo
3:35 pm - 9:25 am
IAD
-
CNX
30h 50m
2 stops
Etihad Airways Logo
8:50 am - 9:45 am
CNX
-
IAD
35h 55m
1 stop
$1,030Etihad Airways
Sat, Apr 4 - Fri, May 1
Multiple Airlines Logo
3:10 pm - 9:20 am
IAD
-
CNX
31h 10m
2 stops
Multiple Airlines Logo
10:10 am - 9:45 am
CNX
-
IAD
34h 35m
2 stops
$1,055Multiple Airlines
Fri, Mar 13 - Sat, Mar 28
Etihad Airways Logo
3:35 pm - 11:20 am
IAD
-
CNX
32h 45m
2 stops
Etihad Airways Logo
8:50 am - 9:45 am
CNX
-
IAD
35h 55m
1 stop
$1,117Etihad Airways
Tue, Mar 3 - Mon, Mar 23
Delta Logo
8:20 am - 10:55 pm
BWI
-
CNX
26h 35m
2 stops
Delta Logo
12:15 am - 5:51 am
CNX
-
BWI
40h 36m
2 stops
$1,280Delta
Fri, Mar 20 - Thu, Mar 26
Delta Logo
6:00 am - 10:55 pm
BWI
-
CNX
29h 55m
2 stops
Delta Logo
12:15 am - 12:53 am
CNX
-
BWI
35h 38m
2 stops
$1,459Delta
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 January, where tickets cost $1,128 (return) on average. On the other hand, the most expensive months are April and August, where the average cost of round-trip tickets is $2,486 and $1,666 respectively.

Good to know

Low seasonApril
Cheapest flight$446
Best time to beat the crowds but there is an average 70% increase in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from Baltimore 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 $446 for a one-way ticket and $941 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?

    SkyTeam is the only airline alliance operating flights between Washington, D.C. and Chiang Mai.

  • 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 $1,371 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 1188 reviews
8.7Crew
8.2Entertainment
8.5Boarding
8.1Food
8.3Comfort
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

It was delayed but other than that it was great.

Got on the plane and sat there for an hour before departure.

Second flight in a row where the entertainment system is broken. 5 hour long flight with no entertainment and flight attendants did not seem interested in resolving the matter. Very shocked to be treated this poorly considering I paid for a first class experience and have Diamond Medallion status.

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

It was nt delta. It was aeromexo. Service was awful. They served a very small drink and NO snack for a 3hr and 35min flight. Then for the first 30 min of the flight is was talk and talk over head interruption the movie/ show i picked to watch.

Comfort seating was on the tight side. Maybe it was a smaller plane(?)

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

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

Information on your arrival and departure airports