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Cheap flights from Chiang Mai to Washington, D.C. from $637

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chiang Mai to Washington, D.C. departing on 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Chiang Mai to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:50 am - 8:00 pm
CNX
-
DCA
44h 10m2 stops
Multiple Airlines Logo
9:59 am - 10:35 am
DCA
-
CNX
36h 36m2 stops
$1,037Multiple Airlines
Sat, Jan 24 - Sat, Jan 31
Korean Air Logo
12:15 am - 4:29 pm
CNX
-
DCA
28h 14m2 stops
Korean Air Logo
6:00 am - 10:55 pm
DCA
-
CNX
28h 55m2 stops
$1,389Korean Air
Wed, Jan 28 - Thu, Feb 5
Multiple Airlines Logo
10:25 pm - 7:45 pm
CNX
-
DCA
33h 20m3 stops
Multiple Airlines Logo
4:15 pm - 2:20 pm
DCA
-
CNX
34h 05m3 stops
$1,650Multiple Airlines
Sat, Jan 24 - Sat, Jan 31

momondo Fare Finder

 
Customize your flight search to find flights from Chiang Mai to Washington, D.C. Reagan-National Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 10, 2025.
Use the filters below to find and compare flights from Chiang Mai to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sat 1/24

11:50 am-8:00 pm

2 stops44h 10m

Washington, D.C. Reagan-National

Sat 1/31

9:59 am-10:35 am

2 stops36h 36m

$1,037

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Wed 1/28

12:15 am-4:29 pm

2 stops28h 14m

Washington, D.C. Reagan-National

Thu 2/5

6:00 am-10:55 pm

2 stops28h 55m

$1,389

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sat 1/24

10:25 pm-7:45 pm

3 stops33h 20m

Washington, D.C. Reagan-National

Sat 1/31

4:15 pm-2:20 pm

3 stops34h 05m

$1,650

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 1/20

7:05 am-9:59 pm

3 stops50h 54m

$637

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Fri 1/30

11:25 am-5:56 pm

2 stops42h 31m

$638

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Fri 1/30

11:25 am-5:56 pm

2 stops42h 31m

$639

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 1/20

11:25 am-4:09 pm

2 stops40h 44m

$729

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sun 4/12

11:20 am-9:56 pm

2 stops45h 36m

$753

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Mon 1/12

7:40 pm-4:09 pm

3 stops56h 29m

$780

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Thu 1/8

9:50 pm-1:01 pm

3 stops51h 11m

$804

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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When to book flights from Chiang Mai to Washington, D.C. Reagan-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chiang Mai to Washington, D.C. Reagan-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chiang Mai to Washington, D.C. Reagan-National Airport (CNX to DCA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chiang Mai to Washington, D.C. Reagan-National Airport

Fastest flight time

44h 10m

Direct flights

None
The fastest flight from Chiang Mai to Washington, D.C. Reagan-National Airport takes 44h 10m
There are no direct flights from Chiang Mai to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Chiang Mai to Washington, D.C. Reagan-National Airport.
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  • How far is Chiang Mai to Washington, D.C. Reagan-National by plane?

    Chiang Mai and Washington, D.C. Reagan-National are 8440.1 mi apart from one another. A reasonable flight in good conditions will take 44h 10m.

  • When did momondo last update prices for flights from Chiang Mai Airport to Washington, D.C. Reagan-National Airport?

    Prices for flights from Chiang Mai Airport to Washington, D.C. Reagan-National Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Chiang Mai Airport to Washington, D.C. Reagan-National Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chiang Mai Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The necessary travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Chiang Mai to Washington, D.C. Reagan-National Airport?

    Price Alerts will notify you by email when the price for flights to Washington, D.C. Reagan-National Airport from Chiang Mai decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Chiang Mai to Washington, D.C. Reagan-National Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Gaithersburg
Reston
Manassas
Fairfax
Glen Burnie
Linthicum Heights
Springfield

Why use momondo?

Why should I use momondo to find a flight deal from Chiang Mai to Washington, D.C.?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Chiang Mai.

Can I find flights from Chiang Mai to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Chiang Mai with this policy.

How can momondo help me find flights from Chiang Mai to Washington, D.C.?

Once you have performed a search for Chiang Mai to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Chiang Mai to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chiang Mai to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

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