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IAD - CNX

$659 Find cheap flights from Washington Dulles Airport 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 Dulles Intl to Chiang Mai departing on 7/22. 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
0 bags
Thu 7/11
Thu 7/18

Search 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
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
12:10 pm - 3:55 pmCNX-IAD
39h 45m2 stops
$1,149
Find Deal
Thu, Sep 19 - Wed, Nov 13
9:05 pm - 11:15 amIAD-CNX
27h 10m2 stops
2:35 pm - 8:45 amCNX-IAD
29h 10m2 stops
$1,152
Find Deal
Tue, Oct 1 - Wed, Oct 23
9:05 pm - 11:15 amIAD-CNX
27h 10m2 stops
10:10 am - 8:35 amCNX-IAD
58h 25m2 stops
$1,200Qatar Airways
Find Deal
Mon, Sep 2 - Fri, Nov 29
9:05 pm - 7:10 pmIAD-CNX
35h 05m2 stops
10:10 am - 8:35 amCNX-IAD
58h 25m2 stops
$1,222Qatar Airways
Find Deal
Fri, Sep 13 - Fri, Nov 29
6:30 am - 11:45 pmIAD-CNX
30h 15m2 stops
12:45 am - 9:06 pmCNX-IAD
31h 21m2 stops
$1,600Asiana Airlines
Find Deal
Tue, Sep 3 - Mon, Sep 9
6:15 pm - 11:45 pmIAD-CNX
42h 30m2 stops
12:45 am - 5:47 amCNX-IAD
40h 02m2 stops
$1,601Asiana Airlines
Find Deal
Wed, Aug 14 - Sun, Aug 25
1:25 pm - 8:40 pmIAD-CNX
44h 15m1 stop
11:15 pm - 9:50 amCNX-IAD
22h 35m1 stop
$1,718Korean Air
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Thu, Sep 19 - Wed, Nov 13
9:42 am - 9:55 pmIAD-CNX
25h 13m2 stops
11:15 pm - 9:50 amCNX-IAD
22h 35m1 stop
$1,723Korean Air
Find Deal
Thu, Sep 19 - Wed, Nov 13
6:00 am - 9:55 pmIAD-CNX
28h 55m2 stops
11:15 pm - 9:50 amCNX-IAD
22h 35m1 stop
$1,816Delta
Find Deal
Thu, Sep 5 - Thu, Nov 28
5:10 pm - 8:40 pmIAD-CNX
40h 30m2 stops
11:15 pm - 5:56 amCNX-IAD
41h 41m2 stops
$1,935Delta
Find Deal
Mon, Jul 22 - Thu, Aug 8

Flights from Dulles Intl to Chiang Mai - Travel Insights & Trends

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 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 September, where tickets cost $1,280 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,968 and $1,915 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Chiang Mai?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Dulles Intl Airport to Chiang Mai, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Chiang Mai, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 74 days before departure.

Which airlines provide the cheapest flights from Washington Dulles Airport to Chiang Mai?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Washington Dulles Airport to Chiang Mai found by KAYAK users in the last 72 hours was for $1,200 on Qatar Airways, followed by Asiana Airlines ($1,600). One-way flight deals have also been found from as low as $955 on Asiana Airlines and from $994 on Qatar Airways.

Good to know

Low season

August

High season

November

Cheapest flight

$659
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly and prices are also 10% lower on average.
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 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Chiang Mai was $659 for a one-way ticket and $1,149 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, oneworld, 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.

  • What is the most popular layover when flying to Chiang Mai from Washington Dulles Airport?

    Incheon is the most popular layover city among KAYAK users traveling from Washington Dulles Airport to 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 $1,450 and an overall rating of 8.5, Korean Air is the most popular choice. Delta is also a great choice for the route, with an average price of $1,308 and an overall rating of 8.0.

  • 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.

See more FAQs

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
Korean AirOverall score based on 1132 reviews
8.3Comfort
8.2Food
8.8Crew
8.6Boarding
8.2Entertainment
Airline reviews

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

10.0 ExcellentAnonymous, Apr 2024IAD - ICN
Read more about Korean Air reviews

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

On time and flight crew are always so happy to help and always smiling unlike other airlines.

Great crew, decent food Charging plugs were broken on both seats next to me. Only the USB port was available, and that charges, very, very slowly. Seat was also broken, it would not lock into position when reclining.

Korean Air had great service and the Bibimbap dish was the best airplane food I’ve ever had. It was a long flight so in between the two meals they served customers could get Shin ramen. The flight attendants let my children use a pair of nice headphones for the flight and had earbuds and slippers for all the adults. The flight was long but the time passed by relatively quickly because they have many great shows in their entertainment TV. I watched the BTS Love Yourself and Speak Yourself concerts 💜

It was ok. Not good and not a bad experience

not too bad but not too great either. Service on all airlines declined ever since covid. Your Delta Stewardess are not that friendly at all. :-(

You did not put me on a Korean Air flight! so I do not have nothing to say

My flight was diverted to Atlanta and I was not given enough time. I paid my travel on April 23, 2023. It was originally Delta from Norfolk to NY, then Korean Air from NY all the way Philippines which is my final stop. Instead from Atlanta to Korea I flew Delta which is okay. Then Korea to Philippines, I flew Asiana Airlines. What I did not like, Ieagle did not sent me an email that my flight was change and so when I went to check in Wednesday the 10th, at 4:30 a.m they told me my flight was delayed at 6;00 p.m and diverted in Atlanta and I am flying Asiana from Korea to Philippines. I do not appreciate that Kayak or Ieagle chenge our flights 5 times and then last minute change again during my day of flight. I hope that you will not make any changes of my flight o Feb 15th because it has to be the same flight with my husband. That is the reason why we made the arrangements early on.

Wonderful cabin crew!!!!! Food was poor, in flight entertainment was just ok. They need to serve more water on a 15 hour flight--we were dehydrated and kept asking for water.

Going through security a third time to get on the next flight was again utterly ridiculous and unnecessary. We were in a International secure area once again and as far as I'm concerned should not have been put through the gears for absolutely no reason. The United States can get all the information they need from the travel itinerary, there was no need to be forced out of a secure area to personally interview everyone on a connecting flight to find out their US immigration status.

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

Staff was very friendly. There is no on board entertainment, but it’s such a short flight that it doesn’t matter. We also got a meal which was nice and unexpected due to the length of the flight.

Flight was fine overall. What you would expect from economy seats. I did appreciate the amenities (eyemask, earplugs, small toothbrush and toothpaste, thin socks).

Besides the flight cancellation, everything else was prefect. Kudos to Malaysian Airlines.

Operated by American Airlines. Very chaotic and the crew was bit rough responding any enquiries. Restricted leg space.. Qatar would have been better

Qatar airways from Doha to guangzhau was excellent big bird Boeing 777 more room and smoothly flight, I Love it

It was good no problems made it on time for the next flight overseas!

The made us waiting and held our passports and boarding pass making us miss our flights

Not impressed. Only allowed one carry on on such a long flight.

The flight was good but my neighbor had the vent open full power for the whole flight and because the air was blowing from the side instead of from the top and I got very cold and ended up with a sore throat.

Bad experience with the delay n long wait time for connecting flight after missing the connection flight from Doha.

Book cheap flights from Washington, D.C. to Chiang Mai

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Chiang Mai found on KAYAK in the last 72 hours.
7/22Mon
3 stops
50h 20mIAD-CNX
$659
7/17Wed
3 stops
36h 55mIAD-CNX
$802
7/21Sun
3 stops
33h 45mIAD-CNX
$805
7/20Sat
2 stopsAsiana Airlines
30h 15mIAD-CNX
$955
7/11Thu
2 stopsAsiana Airlines
30h 15mIAD-CNX
$958
6/19Wed
2 stopsQatar Airways
35h 25mIAD-CNX
$994
7/22Mon
2 stopsDelta
27h 40mIAD-CNX
$1,004
10/15Tue
1 stopKorean Air
44h 20mIAD-CNX
$1,026
7/21Sun
1 stopDelta
44h 00mIAD-CNX
$1,049
7/11Thu
1 stopKorean Air
44h 00mIAD-CNX
$1,846

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Washington Dulles Airport - Chiang Mai Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Chiang Mai (CNX)Thailand

Return flight deals:

Chiang Mai - Washington Dulles Airport

Cabin classes:

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