In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest time of day to fly from CNX to DCA?

When flying from Chiang Mai to Washington, D.C. Reagan-National Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Chiang Mai to Washington, D.C. Reagan-National?

Located just 1.9 mi from the city center, Chiang Mai is the airport most travelers will use when flying to Washington, D.C. Reagan-National from Chiang Mai. Booking flights from Chiang Mai (CNX) to Washington, D.C. Reagan-National should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Reagan-National from 0 different airlines.

Can I find deals for flights from Chiang Mai to Reagan-National that include hotel bookings?

Yes. In addition to deals on Chiang Mai to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Chiang Mai to Reagan-National?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chiang Mai to Reagan-National.

Can I find deals for business class flights from Chiang Mai to Reagan-National?

Yes. Cheapflights offers flight deals from Chiang Mai to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$642+ Flights from Chiang Mai to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Chiang Mai to Reagan-National

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Round-trip from	$1,093 (Gurufare)
One-way from	$642 (Trip.com)

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Cheapest flights from Chiang Mai to Reagan-National
Explore the most affordable flight options available from Chiang Mai to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

Mon 5/1811:35 amCNX - DCA

2 stops43h 31mMultiple Airlines

Mon 6/226:59 pmDCA - CNX

2 stops28h 26mMultiple Airlines

Deal found 1/5

$1,093

Mon 5/1811:35 amCNX - DCA

2 stops43h 31mMultiple Airlines

Sun 6/216:59 pmDCA - CNX

2 stops28h 26mMultiple Airlines

Deal found 1/5

$1,252

Tue 5/195:20 pmCNX - DCA

2 stops37h 46mMultiple Airlines

Sun 6/219:59 amDCA - CNX

2 stops43h 21mMultiple Airlines

Deal found 1/5

$1,380

Best flights from Chiang Mai to Reagan-National
Discover carefully curated flight deals from Chiang Mai to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 6, 2026.

Mon 5/1811:35 amCNX - DCA

2 stops43h 31mMultiple Airlines

Mon 6/226:59 pmDCA - CNX

2 stops28h 26mMultiple Airlines

Deal found 1/5

$1,093

Tue 5/1911:35 amCNX - DCA

2 stops43h 31mMultiple Airlines

Mon 6/226:59 pmDCA - CNX

2 stops28h 26mMultiple Airlines

Deal found 1/5

$1,093

Mon 5/1811:35 amCNX - DCA

2 stops43h 31mMultiple Airlines

Sun 6/216:59 pmDCA - CNX

2 stops28h 26mMultiple Airlines

Deal found 1/5

$1,252

Tue 5/195:20 pmCNX - DCA

2 stops37h 46mMultiple Airlines

Sun 6/219:59 amDCA - CNX

2 stops43h 21mMultiple Airlines

Deal found 1/5

$1,380

One-way flights from Chiang Mai to Reagan-National
Search for one-way flight options from Chiang Mai to Reagan-National. Find affordable one-way fares based on user searches. Data last updated January 6, 2026.

Sun 4/1211:20 amCNX - DCA

3 stops34h 35mMultiple Airlines

Deal found 1/5

$642

Fri 1/303:35 pmCNX - DCA

2 stops40h 25mMultiple Airlines

Deal found 1/5

$702

Sun 5/311:20 amCNX - DCA

2 stops43h 40mMultiple Airlines

Deal found 1/5

$704

Sat 4/411:20 amCNX - DCA

3 stops59h 45mMultiple Airlines

Deal found 1/4

$831

Mon 1/125:35 pmCNX - DCA

2 stops34h 34mChina Airlines

Deal found 1/6

$952

Mon 1/129:25 pmCNX - DCA

3 stops54h 44mMultiple Airlines

Deal found 1/6

$963

Sun 1/1110:35 amCNX - DCA

3 stops47h 24mMultiple Airlines

Deal found 1/6

$1,012

Cheapflights Fare Finder

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

Mon 5/18

11:35 am-8:06 pm

2 stops43h 31m

Washington, D.C. Reagan-National

Mon 6/22

6:59 pm-10:25 am

2 stops28h 26m

$1,093

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 5/19

11:35 am-8:06 pm

2 stops43h 31m

Washington, D.C. Reagan-National

Mon 6/22

6:59 pm-10:25 am

2 stops28h 26m

$1,093

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Mon 5/18

11:35 am-8:06 pm

2 stops43h 31m

Washington, D.C. Reagan-National

Sun 6/21

6:59 pm-10:25 am

2 stops28h 26m

$1,252

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 5/19

5:20 pm-8:06 pm

2 stops37h 46m

Washington, D.C. Reagan-National

Sun 6/21

9:59 am-4:20 pm

2 stops43h 21m

$1,380

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sun 4/12

11:20 am-10:55 am

3 stops34h 35m

$642

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Fri 1/30

3:35 pm-8:00 pm

2 stops40h 25m

$702

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sun 5/3

11:20 am-8:00 pm

2 stops43h 40m

$704

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Sat 4/4

11:20 am-12:05 pm

3 stops59h 45m

$831

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Mon 1/12

5:35 pm-4:09 pm

2 stops34h 34m

$952

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Mon 1/12

9:25 pm-4:09 pm

3 stops54h 44m

$963

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 11 results

Best time to book a flight from Chiang Mai to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Chiang Mai with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Chiang Mai to Washington, D.C. Reagan-National?
Located just 1.9 mi from the city center, Chiang Mai is the airport most travelers will use when flying to Washington, D.C. Reagan-National from Chiang Mai. Booking flights from Chiang Mai (CNX) to Washington, D.C. Reagan-National should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Reagan-National from 0 different airlines.
Can I find deals for flights from Chiang Mai to Reagan-National that include hotel bookings?
Yes. In addition to deals on Chiang Mai to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Chiang Mai to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chiang Mai to Reagan-National.
Can I find deals for business class flights from Chiang Mai to Reagan-National?
Yes. Cheapflights offers flight deals from Chiang Mai to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$642+ Cheap flights from Chiang Mai (CNX) to Reagan-National (DCA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Chiang Mai to Reagan-National with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Chiang Mai to Reagan-National

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Round-trip from

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Find flight deals from Chiang Mai to Reagan-National

Cheapest flights from Chiang Mai to Reagan-NationalExplore the most affordable flight options available from Chiang Mai to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

Explore the most affordable flight options available from Chiang Mai to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chiang Mai to Washington, D.C. Reagan-National Airport that are best for you.

Best time to book a flight from Chiang Mai to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Chiang Mai with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Chiang Mai to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Chiang Mai to Washington, D.C. Reagan-National?

Can I find deals for flights from Chiang Mai to Reagan-National that include hotel bookings?

How can I find direct flights from Chiang Mai to Reagan-National?

Can I find deals for business class flights from Chiang Mai to Reagan-National?

Traveling to a place near Washington, D.C. Reagan-National Airport?

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Cheapest flights from Chiang Mai to Reagan-National
Explore the most affordable flight options available from Chiang Mai to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.