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WAS - CNX

$1,149 Find cheap flights from Washington, D.C. to Chiang Mai

This is the cheapest round-trip 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 9/8. 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
sáb. 6/29
sáb. 7/6

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 42,686,544 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

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

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
2:35 pm - 8:45 amCNX-IAD
29h 10m2 stops
$1,149
Find Deal
dom., sep. 8 - dom., sep. 22
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
8:00 pm - 8:45 amCNX-IAD
47h 45m2 stops
$1,164
Find Deal
mar., sep. 3 - mar., sep. 10
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
8:00 pm - 4:10 pmCNX-IAD
31h 10m2 stops
$1,226Qatar Airways
Find Deal
jue., sep. 5 - mar., sep. 24
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
8:00 pm - 4:10 pmCNX-IAD
31h 10m2 stops
$1,251Qatar Airways
Find Deal
vie., sep. 6 - lun., sep. 23
6:15 pm - 11:45 pmIAD-CNX
42h 30m2 stops
12:45 am - 5:47 amCNX-IAD
40h 02m2 stops
$1,601Asiana Airlines
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mié., ago. 14 - dom., ago. 25
11:50 am - 10:05 pmIAD-CNX
22h 15m1 stop
11:15 pm - 9:50 amCNX-IAD
22h 35m1 stop
$1,640Korean Air
Find Deal
mar., nov. 5 - lun., nov. 11
1:25 pm - 8:40 pmIAD-CNX
44h 15m1 stop
11:15 pm - 11:15 amCNX-IAD
23h 00m1 stop
$1,649Korean Air
Find Deal
dom., sep. 8 - dom., sep. 22
7:05 am - 9:55 pmIAD-CNX
27h 50m2 stops
11:15 pm - 9:40 pmCNX-IAD
33h 25m2 stops
$1,692Delta
Find Deal
mié., jul. 3 - lun., jul. 15
9:00 am - 9:55 pmDCA-CNX
25h 55m2 stops
11:15 pm - 2:50 pmCNX-DCA
26h 35m2 stops
$1,692Delta
Find Deal
mié., jul. 3 - lun., jul. 15
6:30 am - 11:45 pmIAD-CNX
30h 15m2 stops
12:45 am - 5:23 amCNX-IAD
39h 38m2 stops
$1,696Asiana Airlines
Find Deal
mar., jul. 2 - mar., jul. 16

Flights from Washington, D.C. to Chiang Mai - Travel Insights & Trends

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’s the cheapest day of the week to fly from Washington, D.C. to Chiang Mai?

The average price of all flights from Washington, D.C. to Chiang Mai clicked on KAYAK for each day over the last 12 months.
For Washington, D.C. to Chiang Mai, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Chiang Mai back to Washington, D.C., the best deals are generally found on Monday, with Sunday being the most expensive.

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 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 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. 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. 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. 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.

Good to know

Low season

April

High season

January

Cheapest flight

$1,149
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 11% 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 $1,406 for a one-way ticket and $1,149 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, oneworld, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Chiang Mai, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Chiang Mai from Washington, D.C.?

    Incheon is the most popular layover city among KAYAK users traveling from Washington, D.C. 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 $1,446 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 $1,480 and an overall rating of 8.0.

  • 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.

See more FAQs

Top 3 airlines serving 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.
8.5
Korean AirOverall score based on 1150 reviews
8.1Food
8.3Comfort
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

We were seated at the back and that was very uncomfortable for me with the turbulence we experienced on our way to Chicago.

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 💜

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. :-(

Stewardess are nice. Food could have been better and should have a better dessert. They do not offer scotch or beer. You have to ask for it. I also was not happy that you do not serve ginger ale and or cranberry juice. This is my first time that an international flight do not have this. I go home overseas every year and when I travel through ANA, Delta, Qatar, JAL, Asiana Air, United Air. they all serve this two very famous drink. You do not have a great snack tray.

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.

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.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Half the bathrooms assigned to economy were out of action

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

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.

Wore experience due to delay and took me 3 days to reach my destination.

All over with Qatar airlines my experience was really bad due to delays and then putting me on different airlines and after 8 hours of wait I had to listen to their is no plane to fly for another 24 hours. Wore experience ever.

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.
6/3lun.
2 stopsDelta
26h 41mDCA-CNX
$1,406
6/3lun.
2 stopsDelta
27h 40mBWI-CNX
$1,484

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Last minute flights from Washington, D.C. to Chiang Mai

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Chiang Mai that are departing in the next 10 days.
6/2dom.
multi-stop
29h 40mIAD-CNX
6/23dom.
multi-stop
35h 10mCNX-IAD
$1,761
6/1sáb.
multi-stopQatar Airways
25h 15mIAD-CNX
6/24lun.
multi-stopQatar Airways
31h 10mCNX-IAD
$1,795
6/2dom.
multi-stopQatar Airways
35h 25mIAD-CNX
7/2mar.
multi-stopQatar Airways
47h 45mCNX-IAD
$1,842
6/4mar.
multi-stopQatar Airways
25h 15mIAD-CNX
6/24lun.
multi-stopQatar Airways
31h 10mCNX-IAD
$1,855
6/4mar.
multi-stopQatar Airways
27h 10mIAD-CNX
6/25mar.
multi-stopQatar Airways
55h 10mCNX-IAD
$1,860
6/3lun.
multi-stopEmirates
35h 25mIAD-CNX
6/20jue.
multi-stopEmirates
33h 30mCNX-IAD
$2,022
5/31vie.
multi-stopEmirates
35h 25mIAD-CNX
6/20jue.
multi-stopEmirates
33h 30mCNX-IAD
$2,072
6/3lun.
multi-stopKorean Air
27h 22mIAD-CNX
6/22sáb.
multi-stopKorean Air
23h 00mCNX-IAD
$5,541
5/31vie.
multi-stopKorean Air
44h 20mIAD-CNX
6/26mié.
multi-stopKorean Air
29h 12mCNX-IAD
$5,757
6/2dom.
multi-stopDelta
44h 15mIAD-CNX
7/2mar.
multi-stopDelta
23h 00mCNX-IAD
$8,795

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Flights to Chiang Mai

Destination:

Chiang Mai (CNX)Thailand

Return flight deals:

Chiang Mai - Washington, D.C.

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