IAD - CNX

$480 Find Cheap Flights from Washington Dulles Airport to Chiang Mai - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Chiang Mai departing on 8/31. 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

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Everything you should know

Cheapest round-trip
$1,057
Typical prices: $1,285-$1,525
EVA Air
Mon 9/7Tue 9/15
IAD - CNX • 1 stop
Cheapest one-way
$480
Multiple Airlines
Mon 8/31
IAD - CNX • 2 stops
Top airlines
Cheapest • from $1,057 (round-trip)
Best reviews • 8.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Chiang Mai. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $922 (round-trip)
Shortest trip • 22h 09m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% 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 Dulles Intl to Chiang Mai (IAD-CNX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl 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 Dulles Intl to Chiang Mai

Mon, Sep 7 - Tue, Sep 15
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
37h 00m
2 stops
$1,057EVA Air
Mon, Aug 31 - Tue, Dec 1
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
37h 10m
2 stops
$1,066EVA Air
Mon, Jan 18 - Mon, Feb 1
Multiple Airlines Logo
8:05 pm - 11:20 am
IAD
-
CNX
27h 15m
2 stops
Multiple Airlines Logo
7:45 pm - 3:55 pm
CNX
-
IAD
32h 10m
2 stops
$1,071Multiple Airlines
Mon, Aug 31 - Tue, Dec 1
EVA Air Logo
1:50 am - 7:10 pm
IAD
-
CNX
30h 20m
2 stops
EVA Air Logo
7:45 pm - 8:55 pm
CNX
-
IAD
37h 10m
2 stops
$1,077EVA Air
Mon, Sep 14 - Mon, Sep 21
Multiple Airlines Logo
9:00 pm - 11:15 am
IAD
-
CNX
27h 15m
2 stops
Multiple Airlines Logo
8:00 pm - 3:40 pm
CNX
-
IAD
30h 40m
2 stops
$1,079Multiple Airlines
Thu, Sep 24 - Wed, Oct 14
Multiple Airlines Logo
9:00 pm - 11:15 am
IAD
-
CNX
51h 15m
2 stops
Multiple Airlines Logo
3:30 pm - 8:45 am
CNX
-
IAD
28h 15m
2 stops
$1,085Multiple Airlines
Sat, Oct 24 - Sun, Nov 1
Korean Air Logo
8:00 am - 10:55 pm
IAD
-
CNX
27h 55m
2 stops
Korean Air Logo
12:15 am - 9:50 am
CNX
-
IAD
21h 35m
1 stop
$1,125Korean Air
Sun, Nov 1 - Sun, Nov 15
Korean Air Logo
11:50 am - 10:55 pm
IAD
-
CNX
23h 05m
1 stop
Korean Air Logo
12:15 am - 9:50 am
CNX
-
IAD
21h 35m
1 stop
$1,254Korean Air
Sat, Jan 16 - Sun, Feb 14
Delta Logo
11:50 am - 10:55 pm
IAD
-
CNX
23h 05m
1 stop
Delta Logo
12:15 am - 9:50 am
CNX
-
IAD
21h 35m
1 stop
$1,266Delta
Sun, Dec 27 - Sat, Feb 27
Delta Logo
6:59 pm - 10:55 pm
IAD
-
CNX
39h 56m
2 stops
Delta Logo
12:15 am - 9:50 am
CNX
-
IAD
21h 35m
1 stop
$1,282Delta
Booking Insights

KAYAK's insights & trends for Dulles Intl to Chiang Mai flights

Get data-powered insights and trends into flights from Dulles Intl 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. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport to Chiang Mai is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and November, where the average cost of round-trip tickets is $1,696 and $1,523 respectively.

Good to know

Low season

May

Cheapest flight

$480
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Washington Dulles Airport to Chiang Mai

When to book flights from Dulles Intl to Chiang Mai

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Chiang Mai flights

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Chiang Mai was $480 for a one-way ticket and $1,057 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Chiang Mai?

    Yes, you’ll need a passport to travel to Chiang Mai from Washington Dulles Airport.

  • Which airports will I be using when flying from Washington Dulles Airport to Chiang Mai?

    Washington Dulles Airport airport is called Washington, D.C. Dulles Intl and the only airport in Chiang Mai is Chiang Mai.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Chiang Mai?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Chiang Mai?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Washington Dulles Airport 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, EVA Air or Korean Air?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Chiang Mai are EVA Air and Korean Air. With an average price for the route of $1,292 and an overall rating of 8.5, EVA Air is the most popular choice. Korean Air is also a great choice for the route, with an average price of $1,488 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Chiang Mai.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport 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 Dulles Airport 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 Dulles Airport 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 Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and CNX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport 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 Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Dulles Intl 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 Dulles Intl 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.
8.5
EVA AirOverall score based on 1504 reviews
8.1Food
8.7Crew
8.4Boarding
8.0Entertainment
8.3Comfort
Airline reviews

I put the review all together for the first review

6.0 GoodRichard, Apr 2026
TPE - BKK
Read more EVA Air reviews

I put the review all together for the first review

I liked that they gave us a couple of meals and drinks but the meal was not good and not many options especially if we are seated in the back of the plane.

Again on this leg the WiFi wouldn't work. The seats were comfortable with adequate cushion and space between seats for my legs. Very nice 3-hour flight.

Everything was great, however the seats in the back are very small. Not as Comfortable as I would have liked.

Excellent food. Good service. Crammed Premium Economy seats. I Asked to change seats during check in. They told me the flight was fully booked. But on board I saw empty seats where I could have been easily relocated.

Good. Please add a non- applicable category to your questions.

Amazing crew, excellent food, business class seats seem a bit dated but are super comfy even for a very tall person. If continuing onto Taipei, the stopover in Bangkok is a bit annoying (queue at security) though the lounge is decent.

Boarding is fast and easy for economy class, food was ok baggage policies are good

Everything was fantastic! It was a short flight but the crew really went above and beyond to make it a great flight. I felt cared for with EVA.

Delayed due to no fault of flight crew. Efficient and worked well together.

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.

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 did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

It was a great experience in all aspects including passengers are respectful to each other. I will consider to fly with Korean Air again in the future.

Excellent service, love the extra amenities (water bottles, blankets, etc.).

It would be better if flight crew can clearly communicate in english. But they are kind and accommodating. Food is good, especially the sandwiches on the self-serving snack trays. They are better than the ones served. Boarding was organized.

They had the same movie choice as my previous flight, not much of a choice, movies were not up to date, music was uninteresting. Other than sitting on the ground for 40 minutes after boarding the plane, with pilot telling us that they couldn't load the plane because of rain, (bullshit) We finally got into Bangkok of course 40 minutes late.

The flight crews were extremely professional, helpful, and courteous. Departure and arrival times were accurate. No delay. I will use K airline again. Thanks

After the gauntlet of unnecessary security, and the two mile jog to make the flight, the flight was delayed 20 minutes on the ground for takeoff.. However, once in the air, the crew gave its usual excellent service.

My son’s suitcase was left behind at SFO and did not make the flight.

Seats were not bad enough and uncomfortable good legroom in the emergency exit row we were in, but we were forbidden to hold my grandson on my lap for a little while, and the stewardess passed us saying it was against regulations which makes little or no sense when you’re 36,000 feet. The food snacks were really bad. Tasteless tasted like wallpaper, but we’re supposed to be protein bars, and the announcements were all completely incoherent because of the noise of the airplane and the lowness and crackly nature of the PA system.. this was disgraceful. No one in our party could understand a word of what the captain or the flight attendant were saying —not a word! The landing was a little hairy in a pretty stiff crosswind -we bounced before the plane stabilized on the runway

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

Everything you need to know for your flight from Dulles Intl to Chiang Mai

Information on your arrival and departure airports