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Chiang Mai

$489+ Cheap flights from Washington, D.C. (WAS) 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — CNX
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 August 18, 2025.

Round-trip from

$917
(FlightHub)

One-way from

$489
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$1,666
From Washington, D.C. (WAS) to Chiang Mai
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One-way flight from Washington, D.C. (WAS) to Chiang Mai
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Highest demand for flights based on searches. 6% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($78 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Washington, D.C. to Chiang Mai

Cheapest flights from Washington, D.C. to Chiang Mai
Explore the most affordable flight options available from Washington, D.C. to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:15 pmIAD - CNX
2 stops34h 05mMultiple Airlines
Wed 9/172:35 pmCNX - IAD
2 stops30h 30mMultiple Airlines
Deal found 8/17$917
This Ovago deal was found by Cheapflights users on 8/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1812:20 pmIAD - CNX
2 stops34h 00mMultiple Airlines
Sun 8/312:35 pmCNX - IAD
2 stops30h 30mMultiple Airlines
Deal found 8/17$924
This Ovago deal was found by Cheapflights users on 8/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1911:00 pmIAD - CNX
1 stop35h 50mAir China
Thu 9/411:05 pmCNX - IAD
1 stop31h 25mAir China
Deal found 8/16$1,027
This Korean Air deal was found by Cheapflights users on 8/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:35 amDCA - CNX
2 stops26h 20mKorean Air
Tue 9/1611:15 pmCNX - DCA
2 stops26h 48mKorean Air
Deal found 8/18$1,034
This oojo deal was found by Cheapflights users on 8/18. 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 9/17:00 amIAD - CNX
2 stops40h 20mChina Airlines
Tue 9/3011:20 amCNX - IAD
2 stops31h 13mChina Airlines
Deal found 8/18$1,067
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/19:00 pmIAD - CNX
2 stops27h 15mMultiple Airlines
Tue 9/303:30 pmCNX - IAD
2 stops28h 10mMultiple Airlines
Deal found 8/17$1,079
This Ovago deal was found by Cheapflights users on 8/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:25 pmIAD - CNX
2 stops35h 50mMultiple Airlines
Sat 10/411:55 amCNX - IAD
2 stops33h 10mMultiple Airlines
Deal found 8/17$1,088
This oojo deal was found by Cheapflights users on 8/18. 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 10/206:25 amIAD - CNX
2 stops40h 55mChina Airlines
Mon 11/105:35 pmCNX - IAD
2 stops24h 48mChina Airlines
Deal found 8/18$1,113
This Expedia deal was found by Cheapflights users on 8/18. 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.
Tue 9/96:59 pmDCA - CNX
2 stops41h 41mMultiple Airlines
Mon 9/1512:45 amCNX - DCA
2 stops52h 14mMultiple Airlines
Deal found 8/18$1,113
This Delta deal was found by Cheapflights users on 8/16. 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.
Tue 9/236:00 amIAD - CNX
2 stops28h 55mDelta
Sun 11/1612:15 amCNX - IAD
2 stops35h 00mDelta
Deal found 8/16$1,128
This Delta deal was found by Cheapflights users on 8/18. 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 10/207:35 pmIAD - CNX
2 stops39h 20mDelta
Sun 11/912:15 amCNX - IAD
2 stops35h 00mDelta
Deal found 8/18$1,133
This Delta deal was found by Cheapflights users on 8/18. 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 10/208:40 pmDCA - CNX
2 stops38h 15mDelta
Sun 11/912:15 amCNX - DCA
2 stops29h 12mDelta
Deal found 8/18$1,133

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 August 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Chiang Mai that are best for you.

Fly from

Washington, D.C.

Fly to

Chiang Mai

Route

Depart

Return

Price

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Thu 9/4

12:25 pm-9:20 am

2 stops33h 55m

Chiang Mai

Wed 9/17

2:35 pm-10:05 am

2 stops30h 30m

$917

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Tue 9/23

12:15 pm-9:20 am

2 stops34h 05m

Chiang Mai

Mon 11/17

10:10 am-9:10 am

2 stops35h 00m

$917

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 9/9

8:35 am-9:55 pm

2 stops26h 20m

Chiang Mai

Tue 9/16

11:15 pm-3:03 pm

2 stops26h 48m

$1,034

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Mon 9/1

7:00 am-10:20 am

2 stops40h 20m

Chiang Mai

Tue 9/30

11:20 am-7:33 am

2 stops31h 13m

$1,067

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Mon 9/1

9:00 pm-9:20 am

2 stops25h 20m

Chiang Mai

Tue 9/30

4:55 pm-8:40 am

2 stops26h 45m

$1,079

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Thu 9/25

12:25 pm-11:15 am

2 stops35h 50m

Chiang Mai

Sat 10/4

11:55 am-10:05 am

2 stops33h 10m

$1,088

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Mon 10/20

6:25 am-10:20 am

2 stops40h 55m

Chiang Mai

Mon 11/10

5:35 pm-6:23 am

2 stops24h 48m

$1,113

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 9/9

6:59 pm-11:40 pm

2 stops41h 41m

Chiang Mai

Mon 9/15

12:45 am-5:59 pm

2 stops52h 14m

$1,113

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Tue 9/23

6:00 am-9:55 pm

2 stops28h 55m

Chiang Mai

Sun 11/16

12:15 am-11:15 pm

2 stops35h 00m

$1,128

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Mon 10/20

8:40 pm-9:55 pm

2 stops38h 15m

Chiang Mai

Sun 11/9

12:15 am-5:27 pm

2 stops29h 12m

$1,133

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 47 results
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Best time to book a flight from Washington, D.C. to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Washington, D.C. 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.

Cheapflights Insights

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

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

Find hourly flight availability from Washington, D.C. to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 25% on flights from Washington, D.C. to Chiang Mai by exploring options for tickets in the evening.

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated August 18, 2025.
See what other customers who have flown with Korean Air from Washington, D.C. to Chiang Mai have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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.?

    For a flight from Washington, D.C. to Chiang Mai, you will be flying into Chiang Mai. Chiang Mai (CNX) is just 1.9 mi from the center of the city. Chiang Mai is the only Chiang Mai airport and it handles 0 inbound flights from Washington, D.C. per day. 2 airlines have flights to Chiang Mai from Washington, D.C. on a regular basis.

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

    For as low as $1,034, Korean Air can have you in Chiang Mai from Washington, D.C. in 26h 20m. Airlines will cover a distance of 8441 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to Chiang Mai round-trip?

    According to our current data, Korean Air ($741), and Delta ($1,028) offers the cheapest pricing from Washington, D.C. to Chiang Mai. Korean Air is 54% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most popular routes from Washington, D.C. to Chiang Mai?

    When deciding which route to take from Washington, D.C. to Chiang Mai consider Washington, D.C. Dulles Intl - Chiang Mai, Baltimore/Washington - Chiang Mai or Washington, D.C. Reagan-National - Chiang Mai as they are the most popular.

  • Can I find deals for flights from Washington, D.C. to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Chiang Mai?

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

  • Can I find deals for business class flights from Washington, D.C. to Chiang Mai?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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. to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Chiang Mai (average of $989). Flying from Washington, D.C. to Chiang Mai in December is currently the most expensive (average of $1,620). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Washington, D.C. to Chiang Mai

Discover the top 2 airlines that operate flights from Washington, D.C. to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$741Average$1,729FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,028Average$1,443FlexibilityNo cancel feeOn-timeN/A

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