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Chiang Mai

$560+ Cheap flights from Reagan-National (DCA) to Chiang Mai (CNX)

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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — CNX
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Reagan-National to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$1,156
(Booking.com)

One-way from

$560
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$1,372
From Washington, D.C. Reagan-National to Chiang Mai
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One-way flight from Washington, D.C. Reagan-National to Chiang Mai
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Highest demand for flights based on searches. 6% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($78 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Reagan-National to Chiang Mai

Cheapest flights from Reagan-National to Chiang Mai
Explore the most affordable flight options available from Reagan-National to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:30 pmDCA - CNX
2 stops39h 25mDelta
Thu 9/1811:15 pmCNX - DCA
2 stops28h 20mDelta
Deal found 9/10$1,094
This Booking.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:00 pmDCA - CNX
3 stops31h 25mMultiple Airlines
Mon 12/111:05 pmCNX - DCA
3 stops35h 30mMultiple Airlines
Deal found 9/11$1,156
This oojo deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:58 pmDCA - CNX
2 stops51h 37mEVA Air
Mon 12/111:50 amCNX - DCA
2 stops44h 10mEVA Air
Deal found 9/10$1,169
This IEagle deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:59 pmDCA - CNX
2 stops28h 36mMultiple Airlines
Sat 11/111:50 amCNX - DCA
2 stops42h 08mMultiple Airlines
Deal found 9/9$1,170
This oojo deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:59 pmDCA - CNX
2 stops28h 36mEVA Air
Sat 11/111:50 amCNX - DCA
2 stops42h 08mEVA Air
Deal found 9/9$1,171
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:00 amDCA - CNX
2 stops29h 55mDelta
Fri 10/3112:15 amCNX - DCA
2 stops29h 18mDelta
Deal found 9/9$1,264
This Expedia deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:59 pmDCA - CNX
2 stops34h 21mMultiple Airlines
Wed 9/1712:45 amCNX - DCA
2 stops32h 49mMultiple Airlines
Deal found 9/10$1,367
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2310:00 pmDCA - CNX
2 stops36h 55mDelta
Fri 11/2812:15 amCNX - DCA
2 stops26h 45mDelta
Deal found 9/11$1,419
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:59 amDCA - CNX
2 stops25h 56mDelta
Sun 11/3012:15 amCNX - DCA
2 stops30h 19mDelta
Deal found 9/11$1,459
This IEagle deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:58 pmDCA - CNX
2 stops51h 37mMultiple Airlines
Sat 11/811:50 amCNX - DCA
2 stops42h 08mMultiple Airlines
Deal found 9/10$1,679

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Chiang Mai 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Chiang Mai that are best for you.

Fly from

Reagan-National

Fly to

Chiang Mai

Route

Depart

Return

Price

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 11/11

2:00 pm-9:25 am

3 stops31h 25m

Chiang Mai

Mon 12/1

11:05 pm-10:35 pm

3 stops35h 30m

$1,156

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 11/11

6:58 pm-10:35 am

2 stops51h 37m

Chiang Mai

Mon 12/1

11:50 am-8:00 pm

2 stops44h 10m

$1,169

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Mon 11/10

6:58 pm-10:35 am

2 stops51h 37m

Chiang Mai

Mon 12/1

11:50 am-8:00 pm

2 stops44h 10m

$1,169

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 10/25

6:59 pm-10:35 am

2 stops28h 36m

Chiang Mai

Sat 11/1

11:50 am-6:58 pm

2 stops42h 08m

$1,170

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 10/25

6:59 pm-10:35 am

2 stops28h 36m

Chiang Mai

Sat 11/1

11:50 am-6:58 pm

2 stops42h 08m

$1,171

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 10/25

6:00 am-10:55 pm

2 stops29h 55m

Chiang Mai

Fri 10/31

12:15 am-6:33 pm

2 stops29h 18m

$1,264

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sun 11/23

10:00 pm-10:55 pm

2 stops36h 55m

Chiang Mai

Fri 11/28

12:15 am-3:00 pm

2 stops26h 45m

$1,419

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Mon 11/10

8:59 am-10:55 pm

2 stops25h 56m

Chiang Mai

Sun 11/30

12:15 am-7:36 pm

2 stops31h 21m

$1,459

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Fri 10/17

6:31 pm-9:35 pm

3 stops40h 04m

$560

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 10/21

6:31 pm-9:35 pm

3 stops40h 04m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 16 results
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Best time to book a flight from Reagan-National to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Reagan-National 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

Find useful and relevant information for your journey from Reagan-National to Chiang Mai. 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 into for flights to Chiang Mai from Washington, D.C. Reagan-National?

    Chiang Mai (CNX), located 1.9 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Reagan-National to Chiang Mai. 0 airlines have flights to Chiang Mai from Washington, D.C. Reagan-National on a regular basis. Booking flights from Washington, D.C. Reagan-National to Chiang Mai should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Reagan-National per day.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Chiang Mai?

    There are many flights that can get you from Washington, D.C. Reagan-National Airport to Chiang Mai in 51h 37m. Fly via EVA Air to get the fastest option. There are 8441 mi between Washington, D.C. Reagan-National Airport and Chiang Mai.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Chiang Mai (average of $977). Flying from Washington, D.C. Reagan-National Airport to Chiang Mai in June is currently the most expensive (average of $1,562). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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