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Distance from Windham, CT to IAD Airport

Distance

392 mi

Time

8 hours 16 mins

Gas Cost

$33 - $64

Helpful Inaccurate

There are 337.45 miles from Windham to Washington Dulles International Airport (IAD) in southwest direction and 392 miles (630.86 kilometers) by car, following the I-95 and NJTP route.

Windham and IAD Airport are 8 hours 16 mins far apart, if you drive non-stop .

This is the fastest route from Windham, CT to IAD Airport. The halfway point is Allentown, NJ.

Windham, CT and IAD Airport are in the same time zone (EDT). Current time in both locations is 2:16 am.

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Lowest Price Rental Cars in Windham, CT

Planning on renting a car to go from Windham, CT to IAD Airport? Here there are some offers to rent a car in Windham, CT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Windham »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 15.75 gallons of gas to cover the route between Windham, CT and IAD Airport.

The estimated cost of gas to go from Windham to IAD Airport is $46.

During the route, an average car will release 308.63 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $2.92 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Windham, CT and IAD Airport

If you want to meet halfway between Windham, CT and IAD Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 40.191071 and -74.594673, or 40º 11' 27.8556" N, 74º 35' 40.8228" W. This location is 196.13 miles away from Windham, CT and IAD Airport and it would take approximately 4 hours 8 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Allentown, NJ, situated 203 miles from Windham, CT and 199 miles from IAD Airport. It would take 3 hours 41 mins to go from Windham to Allentown and 3 hours 31 mins to go from IAD to Allentown.

Major City Closest to Halfway Point

The major city closest to the halfway point between Windham, CT and IAD Airport is Edison, NJ, situated 178 miles from Windham, CT and 223 miles from IAD Airport. It would take 3 hours 21 mins to go from Windham to and 3 hours 54 mins to go from IAD to Edison.