Distance between cities › USA › Illinois › Walnut, IL › Distance from Walnut to Washington Dulles International Airport Book Hotels

Distance from Walnut, IL to IAD Airport

Distance

779 mi

Time

15 hours 10 mins

Gas Cost

$73 - $141

Helpful Inaccurate

There are 664.14 miles from Walnut to Washington Dulles International Airport (IAD) in southeast direction and 779 miles (1,253.68 kilometers) by car, following the I-80 and I-90 route.

Walnut and IAD Airport are 15 hours 10 mins far apart, if you drive non-stop .

This is the fastest route from Walnut, IL to IAD Airport. The halfway point is Vickery, OH.

Please note the time difference between Walnut, IL and IAD Airport is 1 hour. The current time in Walnut is 1:25 pm and the current time in IAD Airport is 2:25 pm.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Walnut, IL to IAD Airport:

Lowest Price Rental Cars in Walnut, IL

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Walnut »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 31.29 gallons of gas to cover the route between Walnut, IL and IAD Airport.

The estimated cost of gas to go from Walnut to IAD Airport is $102.08.

During the route, an average car will release 613.09 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Walnut, IL and IAD Airport

If you want to meet halfway between Walnut, IL 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 41.381664 and -82.965027, or 41º 22' 53.9904" N, 82º 57' 54.0972" W. This location is 389.60 miles away from Walnut, IL and IAD Airport and it would take approximately 7 hours 35 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Vickery, OH, situated 382 miles from Walnut, IL and 427 miles from IAD Airport. It would take 6 hours 23 mins to go from Walnut to Vickery and 6 hours 59 mins to go from IAD to Vickery.