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Cheap flights from Chiang Mai to Washington, D.C. from $666

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 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Korean Air Logo
9:45 pm - 9:21 pm
CNX
-
DCA
34h 36m
2 stops
Korean Air Logo
8:30 pm - 8:45 pm
DCA
-
CNX
61h 15m
2 stops
$1,682Korean Air
Thu, Sep 3 - Mon, Sep 7
Korean Air Logo
9:45 pm - 9:21 pm
CNX
-
DCA
34h 36m
2 stops
Korean Air Logo
8:00 am - 8:45 pm
DCA
-
CNX
25h 45m
2 stops
$1,690Korean Air
Thu, Sep 3 - Mon, Sep 7
Korean Air Logo
9:45 pm - 12:47 pm
CNX
-
DCA
50h 02m
2 stops
Korean Air Logo
7:30 pm - 8:45 pm
DCA
-
CNX
62h 15m
2 stops
$1,691Korean Air
Thu, Sep 3 - Mon, Sep 7
Korean Air Logo
9:45 pm - 3:07 pm
CNX
-
DCA
28h 22m
2 stops
Korean Air Logo
5:00 pm - 8:45 pm
DCA
-
CNX
64h 45m
2 stops
$1,697Korean Air
Mon, Sep 21 - Thu, Sep 24
Korean Air Logo
9:45 pm - 11:24 pm
CNX
-
DCA
36h 39m
2 stops
Korean Air Logo
7:30 pm - 8:45 pm
DCA
-
CNX
62h 15m
2 stops
$1,749Korean Air
Thu, Sep 3 - Mon, Sep 7

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Korean Air flights from Chiang Mai to Washington, D.C. Reagan-National Airport

Our best Korean Air deals on Chiang Mai to Washington, D.C. Reagan-National Airport flight tickets
Korean Air
Sep 3
CNX9:45 pmChiang Mai
34h 36m
2 stops
DCA9:21 pmWashington, D.C. Reagan-National
Sep 7
DCA8:30 pmWashington, D.C. Reagan-National
61h 15m
2 stops
CNX8:45 pmChiang Mai
$1,682
Korean Air
Sep 3
CNX9:45 pmChiang Mai
34h 36m
2 stops
DCA9:21 pmWashington, D.C. Reagan-National
Sep 7
DCA8:00 amWashington, D.C. Reagan-National
25h 45m
2 stops
CNX8:45 pmChiang Mai
$1,690
Korean Air
Sep 3
CNX9:45 pmChiang Mai
50h 02m
2 stops
DCA12:47 pmWashington, D.C. Reagan-National
Sep 7
DCA7:30 pmWashington, D.C. Reagan-National
62h 15m
2 stops
CNX8:45 pmChiang Mai
$1,691

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 April 17, 2026.
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

Cheapest round-trip

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Thu 9/3

9:45 pm-9:21 pm

2 stops34h 36m

Washington, D.C. Reagan-National

Mon 9/7

8:30 pm-8:45 pm

2 stops61h 15m

$1,682
Quickest round-trip

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Thu 9/3

9:45 pm-9:21 pm

2 stops34h 36m

Washington, D.C. Reagan-National

Mon 9/7

8:00 am-8:45 pm

2 stops25h 45m

$1,690

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Thu 9/3

9:45 pm-12:47 pm

2 stops50h 02m

Washington, D.C. Reagan-National

Mon 9/7

7:30 pm-8:45 pm

2 stops62h 15m

$1,691

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Mon 9/21

9:45 pm-3:07 pm

2 stops28h 22m

Washington, D.C. Reagan-National

Thu 9/24

5:00 pm-8:45 pm

2 stops64h 45m

$1,697

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Thu 9/3

9:45 pm-11:24 pm

2 stops36h 39m

Washington, D.C. Reagan-National

Mon 9/7

7:30 pm-8:45 pm

2 stops62h 15m

$1,749
Cheapest one-way
Quickest one-way

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 9/1

11:20 am-8:00 pm

2 stops43h 40m

$666

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 9/1

8:25 am-8:00 pm

3 stops46h 35m

$729

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Fri 5/29

7:10 am-8:06 pm

3 stops47h 56m

$838

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Fri 5/29

11:20 am-8:06 pm

2 stops43h 46m

$851

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

36h 39m

Direct flights

None
The fastest flight from Chiang Mai to Washington, D.C. Reagan-National Airport takes 36h 39m
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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Frequently asked questions about flying from Chiang Mai to Washington, D.C. Reagan-National Airport

  • 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 36h 39m.

  • 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.

Frequently asked questions about flying from Chiang Mai to Washington, D.C. Reagan-National Airport

  • 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
Waldorf
Woodbridge
Laurel
Colonial Beach
Gaithersburg
Towson
Fredericksburg
Silver Spring
Rockville
Manassas
Tysons
Linthicum Heights
Bethesda
Fairfax
Springfield
College Park

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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