WAS - CNX

$483 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 11/4. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

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

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

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

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

Sat, Jan 17 - Sat, Feb 14
Multiple Airlines Logo
11:05 am - 11:20 amIAD-CNX
36h 15m2 stops
Multiple Airlines Logo
9:40 pm - 9:10 amCNX-IAD
47h 30m2 stops
$985Multiple Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
Multiple Airlines Logo
9:00 pm - 4:15 pmIAD-CNX
32h 15m2 stops
Multiple Airlines Logo
4:55 pm - 8:40 amCNX-IAD
26h 45m2 stops
$989Multiple Airlines
Find Deal
Sat, Jan 17 - Sun, Feb 15
Multiple Airlines Logo
11:05 am - 9:25 amIAD-CNX
34h 20m2 stops
Multiple Airlines Logo
10:10 am - 9:10 amCNX-IAD
35h 00m2 stops
$992Multiple Airlines
Find Deal
Mon, Mar 9 - Wed, Mar 11
Delta Logo
8:10 am - 10:55 pmBWI-CNX
27h 45m2 stops
Delta Logo
12:15 am - 10:59 pmCNX-BWI
33h 44m2 stops
$1,079Delta
Find Deal
Sun, Feb 15 - Sun, Mar 22
Delta Logo
7:59 pm - 10:55 pmIAD-CNX
38h 56m2 stops
Delta Logo
12:15 am - 11:16 pmCNX-IAD
34h 01m2 stops
$1,084Delta
Find Deal
Thu, Mar 5 - Mon, Mar 9
Qatar Airways Logo
8:05 pm - 9:25 amIAD-CNX
25h 20m2 stops
Qatar Airways Logo
12:10 pm - 4:55 pmCNX-IAD
39h 45m2 stops
$1,110Qatar Airways
Find Deal
Sat, Jan 24 - Fri, Jan 30
China Airlines Logo
5:30 pm - 4:35 pmDCA-CNX
35h 05m2 stops
China Airlines Logo
11:25 am - 8:55 pmCNX-DCA
45h 30m2 stops
$1,121China Airlines
Find Deal
Sun, Nov 16 - Sat, Dec 6
China Airlines Logo
7:38 am - 10:25 amBWI-CNX
38h 47m2 stops
China Airlines Logo
11:25 am - 6:16 pmCNX-BWI
42h 51m2 stops
$1,243China Airlines
Find Deal
Thu, Mar 5 - Sun, Mar 8
Korean Air Logo
8:20 am - 10:55 pmDCA-CNX
26h 35m2 stops
Korean Air Logo
12:15 am - 6:06 pmCNX-DCA
28h 51m2 stops
$1,264Korean Air
Find Deal
Wed, Jan 7 - Tue, Feb 17
Korean Air Logo
8:20 am - 10:55 pmDCA-CNX
26h 35m2 stops
Korean Air Logo
12:15 am - 1:25 pmCNX-DCA
25h 10m2 stops
$1,381Korean Air
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $1,079 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
June
Cheapest • 23% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$985
Multiple Airlines
Sat 1/17Sat 2/14
IAD - CNX • 2 stops
Cheapest one-way
$483
Multiple Airlines
Tue 11/4
BWI - CNX • 3 stops
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!
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’s the cheapest day of the week to fly from Washington, D.C. to Chiang Mai?

The average price of all round-trip 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 Tuesday 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 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 June, where tickets cost $1,187 (return) on average. On the other hand, the most expensive months are April and November, where the average cost of round-trip tickets is $2,486 and $1,787 respectively.

Find deals

Good to know

Low seasonApril
Cheapest flight$483
Best time to beat the crowds but there is an average 60% increase in price.
Most popular time to fly with an average 3% increase in price.
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 $483 for a one-way ticket and $985 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, Star Alliance, and oneworld 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.

  • 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 airline 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 1140 reviews
8.5Boarding
8.1Food
8.3Comfort
8.7Crew
8.2Entertainment
Airline reviews

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.

8.0 ExcellentMatt, Aug 2025ATL - EWR
Read more Korean Air reviews

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

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

Not many people, so you can lay down on two seats

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

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

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

Information on your arrival and departure airports

Chiang Mai (CNX)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.