HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$494+ 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 7/17. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — CNX
Aug 3 — Aug 101
Mon 8/3
Mon 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 July 4, 2026.

This Rumbo deal was found by Cheapflights users on 6/29. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:59 pm
IAD
-
CNX
2 stops38h 56m
Korean Air
Sun 11/1512:15 am
CNX
-
IAD
1 stop21h 35m
Korean Air
Deal found 6/29$940
This Korean Air deal was found by Cheapflights users on 6/30. 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.
Thu 11/56:59 am
DCA
-
CNX
2 stops27h 56m
Korean Air
Sun 11/812:15 am
CNX
-
DCA
2 stops25h 10m
Korean Air
Deal found 6/30$993
This Delta deal was found by Cheapflights users on 6/29. 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 11/17:00 am
IAD
-
CNX
2 stops27h 55m
Delta
Sun 11/1512:15 am
CNX
-
IAD
2 stops30h 55m
Delta
Deal found 6/29$1,037
This Trip.com deal was found by Cheapflights users on 6/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:10 pm
IAD
-
CNX
2 stops32h 00m
Multiple Airlines
Mon 10/127:00 am
CNX
-
IAD
2 stops37h 45m
Multiple Airlines
Deal found 6/30$1,041
This oojo deal was found by Cheapflights users on 6/30. 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.
Wed 9/169:00 pm
IAD
-
CNX
2 stops27h 15m
Multiple Airlines
Wed 9/239:10 pm
CNX
-
IAD
2 stops29h 30m
Multiple Airlines
Deal found 6/30$1,109
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Sun 9/279:00 pm
IAD
-
CNX
2 stops27h 15m
Multiple Airlines
Mon 10/58:00 pm
CNX
-
IAD
2 stops30h 40m
Multiple Airlines
Deal found 7/2$1,110
This Trip.com deal was found by Cheapflights users on 7/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:25 am
BWI
-
CNX
3 stops40h 20m
Multiple Airlines
Mon 8/2410:30 am
CNX
-
BWI
3 stops46h 00m
Multiple Airlines
Deal found 7/3$1,216
This FlightHub deal was found by Cheapflights users on 6/30. 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.
Sun 11/16:12 pm
BWI
-
CNX
2 stops28h 23m
Multiple Airlines
Mon 11/1611:50 am
CNX
-
BWI
2 stops29h 50m
Multiple Airlines
Deal found 6/30$1,278
This Korean Air deal was found by Cheapflights users on 7/2. 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.
Thu 11/56:03 am
BWI
-
CNX
2 stops28h 52m
Korean Air
Sun 11/812:15 am
CNX
-
BWI
2 stops24h 12m
Korean Air
Deal found 7/2$1,306
This Korean Air deal was found by Cheapflights users on 7/3. 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.
Sun 11/17:40 pm
BWI
-
CNX
2 stops39h 15m
Korean Air
Sun 11/1512:15 am
CNX
-
BWI
2 stops24h 12m
Korean Air
Deal found 7/3$1,313
This FlightHub deal was found by Cheapflights users on 6/30. 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 9/247:15 pm
BWI
-
CNX
2 stops28h 10m
Multiple Airlines
Wed 10/1411:35 am
CNX
-
BWI
2 stops28h 45m
Multiple Airlines
Deal found 6/30$1,316
This Delta deal was found by Cheapflights users on 7/1. 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.
Fri 11/206:05 am
DCA
-
CNX
2 stops28h 50m
Delta
Fri 11/2712:15 am
CNX
-
DCA
2 stops29h 50m
Delta
Deal found 7/1$1,321

Find 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 July 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$993
(Korean Air)

One-way from

$494
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$1,233
Provider with most accurate pricing for Washington, D.C. (WAS)-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chiang Mai flights.
Search Deals
From Washington, D.C. (WAS) to Chiang Mai
Search Deals
One-way flight from Washington, D.C. (WAS) to Chiang Mai
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 4, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Thu 11/5

6:59 am-10:55 pm

2 stops27h 56m

Chiang Mai

Sun 11/8

12:15 am-1:25 pm

2 stops25h 10m

$993

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Thu 9/24

9:00 pm-7:10 pm

2 stops35h 10m

Chiang Mai

Wed 10/14

4:55 pm-8:45 am

2 stops26h 50m

$1,120

BaltimoreChiang Mai

BWI - CNX

BWICNX

Baltimore/Washington

Mon 8/17

6:25 am-9:45 am

3 stops40h 20m

Chiang Mai

Mon 8/24

10:30 am-9:30 pm

3 stops46h 00m

$1,216

Washington, D.C.Chiang Mai

IAD - CNX

IADCNX

Washington, D.C. Dulles Intl

Wed 9/9

1:15 am-7:10 pm

2 stops30h 55m

Chiang Mai

Mon 9/14

8:00 pm-10:00 pm

2 stops61h 00m

$1,295

BaltimoreChiang Mai

BWI - CNX

BWICNX

Baltimore/Washington

Thu 11/5

7:00 am-10:55 pm

2 stops27h 55m

Chiang Mai

Sun 11/8

12:15 am-12:27 pm

2 stops24h 12m

$1,306

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Fri 11/20

6:05 am-10:55 pm

2 stops28h 50m

Chiang Mai

Fri 11/27

12:15 am-6:05 pm

2 stops29h 50m

$1,321

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Thu 10/8

9:30 am-10:25 am

2 stops61h 55m

Chiang Mai

Mon 10/12

11:35 am-8:00 pm

2 stops43h 25m

$1,342

BaltimoreChiang Mai

BWI - CNX

BWICNX

Baltimore/Washington

Sun 11/1

7:00 am-10:55 pm

2 stops27h 55m

Chiang Mai

Sun 11/15

12:15 am-12:27 pm

2 stops24h 12m

$1,344

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 8/8

6:59 pm-10:25 am

2 stops52h 26m

Chiang Mai

Thu 9/3

11:35 am-8:00 pm

2 stops43h 25m

$1,434

BaltimoreChiang Mai

BWI - CNX

BWICNX

Baltimore/Washington

Mon 8/17

6:07 pm-10:25 am

2 stops29h 18m

Chiang Mai

Mon 8/24

11:35 am-6:30 am

2 stops29h 55m

$1,445

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 48 resultsSorted by cheapest first
1
2
3
...
5

Compare providers for flights from Washington, D.C. to Chiang Mai

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Chiang Mai in July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Chiang Mai flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Chiang Mai flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Chiang Mai flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 month to book a flight from Washington, D.C. to Chiang Mai?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Chiang Mai (average of $651). Flying from Washington, D.C. to Chiang Mai in April is currently the most expensive (average of $1,489). 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.

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 July 4, 2026.
See what other customers who have flown with Korean Air and Delta 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
1,220 reviews

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Entertainment

8.2

Overall

8.4

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
1,220 reviews
Korean Air
8.4
Very good
1,220 reviews

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Entertainment

8.2

Overall

8.4

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.
Delta
7.8
Good
8,454 reviews
Korean Air
8.4
Very good
1,220 reviews

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Entertainment

8.2

Overall

8.4

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. 3 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 $993, Korean Air can have you in Chiang Mai from Washington, D.C. in 27h 56m. 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), Delta ($798), and EVA Air ($1,040) offers the cheapest pricing from Washington, D.C. to Chiang Mai. Korean Air is 46% 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Chiang Mai (average of $651). Flying from Washington, D.C. to Chiang Mai in April is currently the most expensive (average of $1,489). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Suvarnabhumi flights
Reagan-National to Suvarnabhumi flights
Dulles Intl to Chiang Mai flights
Reagan-National to Chiang Mai flights
Dulles Intl to Krabi flights

Top 3 airlines flying from Washington, D.C. to Chiang Mai

Discover the top 3 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 July 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$741Average$1,412FlexibilityNo cancel feeOn-time81%
DeltaCheapest$798Average$1,259FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$1,040Average$1,292FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.