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Distance from Cincinnati, OH to IAD Airport

Distance

483 mi

Time

9 hours 47 mins

Gas Cost

$44 - $86

Helpful Inaccurate

There are 378.75 miles from Cincinnati to Washington Dulles International Airport (IAD) in east direction and 483 miles (777.31 kilometers) by car, following the I-70 route.

Cincinnati and IAD Airport are 9 hours 47 mins far apart, if you drive non-stop .

This is the fastest route from Cincinnati, OH to IAD Airport. The halfway point is West Alexander, PA.

Cincinnati, OH and IAD Airport are in the same time zone (EDT). Current time in both locations is 7:13 pm.

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Lowest Price Rental Cars in Cincinnati, OH

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Cincinnati »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 19.38 gallons of gas to cover the route between Cincinnati, OH and IAD Airport.

The estimated cost of gas to go from Cincinnati to IAD Airport is $62.11.

During the route, an average car will release 379.76 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Cincinnati, OH and IAD Airport

If you want to meet halfway between Cincinnati, OH 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 40.092052 and -80.525345, or 40º 5' 31.3872" N, 80º 31' 31.242" W. This location is 241.33 miles away from Cincinnati, OH and IAD Airport and it would take approximately 4 hours 53 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is West Alexander, PA, situated 247 miles from Cincinnati, OH and 270 miles from IAD Airport. It would take 3 hours 53 mins to go from Cincinnati to West Alexander and 4 hours 24 mins to go from IAD to West Alexander.