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WAS - CNX

Find cheap flights from Washington, D.C. to Chiang Mai from $629

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 7/11. 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
Mon 6/3
Mon 6/10

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 43,369,418 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 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
12:10 pm - 3:55 pmCNX-IAD
39h 45m2 stops
$1,149
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Thu, Sep 19 - Wed, Nov 13
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
10:10 am - 8:45 amCNX-IAD
33h 35m2 stops
$1,166
Find Deal
Mon, Sep 30 - Tue, Oct 22
9:05 pm - 9:20 amIAD-CNX
25h 15m2 stops
8:00 pm - 4:10 pmCNX-IAD
31h 10m2 stops
$1,226Qatar Airways
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Tue, Sep 17 - Sat, Sep 21
6:05 am - 8:40 pmBWI-CNX
27h 35m2 stops
11:15 pm - 12:59 amCNX-BWI
36h 44m2 stops
$1,479Delta
Find Deal
Mon, Jul 22 - Wed, Aug 21
10:55 am - 1:45 pmIAD-CNX
39h 50m2 stops
10:10 am - 8:45 amCNX-IAD
33h 35m2 stops
$1,486Qatar Airways
Find Deal
Sun, Jun 2 - Tue, Jul 2
1:25 pm - 8:45 pmIAD-CNX
44h 20m1 stop
11:15 pm - 11:15 amCNX-IAD
23h 00m1 stop
$1,564Korean Air
Find Deal
Tue, Sep 3 - Tue, Sep 10
1:25 pm - 8:40 pmIAD-CNX
44h 15m1 stop
11:15 pm - 9:50 amCNX-IAD
22h 35m1 stop
$1,565Korean Air
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Thu, Oct 17 - Wed, Nov 13
6:30 am - 11:45 pmIAD-CNX
30h 15m2 stops
12:45 am - 5:47 amCNX-IAD
40h 02m2 stops
$1,600Asiana Airlines
Find Deal
Tue, Sep 3 - Mon, Sep 9
5:48 pm - 11:45 pmIAD-CNX
42h 57m2 stops
12:45 am - 9:06 pmCNX-IAD
31h 21m2 stops
$1,615Asiana Airlines
Find Deal
Sat, Sep 14 - Fri, Sep 20
1:40 pm - 8:40 pmIAD-CNX
44h 00m1 stop
11:15 pm - 6:05 amCNX-IAD
41h 50m2 stops
$2,459Delta
Find Deal
Mon, Jul 15 - Mon, Aug 5

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 November, where tickets cost $1,307 on average. On the other hand, the most expensive months are May and April, where the average cost of tickets is $2,194 and $1,872 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 2 weeks 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, D.C. to Chiang Mai?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Washington, D.C. to Chiang Mai found on KAYAK was with Delta for $699. Qatar Airways proposed a round-trip connection from $1,226 and Delta from $1,479.

Good to know

Low season

April

High season

January

Cheapest flight

$629
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 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 $629 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 Baltimore/Washington 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 Star Alliance 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 $1,429 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 $1,512 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 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.
8.5
Korean AirOverall score based on 1186 reviews
8.3Comfort
8.2Food
8.8Crew
8.2Entertainment
8.6Boarding
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

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. :-(

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.

Flight arrived early, fantastic, since it is short flight, no food being served

Always fly with Korean Airlines. Best service great food. Nice and clean as always.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

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.
7/11Thu
2 stops
40h 49mBWI-CNX
$629
7/11Thu
3 stops
50h 50mBWI-CNX
$687
10/15Tue
2 stopsDelta
42h 19mBWI-CNX
$699
10/15Tue
2 stopsKorean Air
41h 55mDCA-CNX
$889
6/2Sun
2 stopsQatar Airways
35h 25mIAD-CNX
$995
5/31Fri
2 stopsQatar Airways
37h 20mIAD-CNX
$1,029
10/15Tue
3 stopsCathay Pacific
37h 40mDCA-CNX
$1,041
6/29Sat
2 stopsDelta
23h 47mBWI-CNX
$1,252
5/31Fri
3 stopsCathay Pacific
38h 56mDCA-CNX
$1,370
5/27Mon
1 stopKorean Air
44h 15mIAD-CNX
$1,444

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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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