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Distance from Rio, IL to IAD Airport

Distance

819 mi

Time

16 hours 1 min

Gas Cost

$76 - $148

Helpful Inaccurate

There are 700.06 miles from Rio to Washington Dulles International Airport (IAD) in southeast direction and 819 miles (1,318.05 kilometers) by car, following the I-74 and US-51 route.

Rio and IAD Airport are 16 hours 1 min far apart, if you drive non-stop .

This is the fastest route from Rio, IL to IAD Airport. The halfway point is South Vienna, OH.

Please note the time difference between Rio, IL and IAD Airport is 1 hour. The current time in Rio is 1:42 am and the current time in IAD Airport is 2:42 am.

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Lowest Price Rental Cars in Rio, IL

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Rio »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 32.91 gallons of gas to cover the route between Rio, IL and IAD Airport.

The estimated cost of gas to go from Rio to IAD Airport is $107.35.

During the route, an average car will release 644.75 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 Rio, IL and IAD Airport

If you want to meet halfway between Rio, 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 39.928822 and -83.582268, or 39º 55' 43.7592" N, 83º 34' 56.1648" W. This location is 409.71 miles away from Rio, IL and IAD Airport and it would take approximately 8 hours to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is South Vienna, OH, situated 408 miles from Rio, IL and 444 miles from IAD Airport. It would take 6 hours 18 mins to go from Rio to South Vienna and 7 hours to go from IAD to South Vienna.