Distance between cities › USA › South Dakota › Mount Vernon, SD › Distance from Mount Vernon to Washington Dulles International Airport Book Hotels

Distance from Mount Vernon, SD to IAD Airport

Distance

1,324 mi

Time

1 day

Gas Cost

$123 - $240

Helpful Inaccurate

There are 1,124.81 miles from Mount Vernon to Washington Dulles International Airport (IAD) in southeast direction and 1,324 miles (2,130.77 kilometers) by car, following the I-90 route.

Mount Vernon and IAD Airport are 1 day far apart, if you drive non-stop .

This is the fastest route from Mount Vernon, SD to IAD Airport. The halfway point is Lawndale, IL.

Please note the time difference between Mount Vernon, SD and IAD Airport is 1 hour. The current time in Mount Vernon is 6:42 am and the current time in IAD Airport is 7:42 am.

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Lowest Price Rental Cars in Mount Vernon, SD

Planning on renting a car to go from Mount Vernon, SD to IAD Airport? Here there are some offers to rent a car in Mount Vernon, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Mount Vernon »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 53.17 gallons of gas to cover the route between Mount Vernon, SD and IAD Airport.

The estimated cost of gas to go from Mount Vernon to IAD Airport is $173.43.

During the route, an average car will release 1,041.66 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 Mount Vernon, SD and IAD Airport

If you want to meet halfway between Mount Vernon, SD 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 41.870739 and -87.691788, or 41º 52' 14.6604" N, 87º 41' 30.4368" W. This location is 661.94 miles away from Mount Vernon, SD and IAD Airport and it would take approximately 12 hours 21 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lawndale, IL, situated 652 miles from Mount Vernon, SD and 695 miles from IAD Airport. It would take 9 hours 32 mins to go from Mount Vernon to Lawndale and 10 hours 57 mins to go from IAD to Lawndale.

Major City Closest to Halfway Point

The major city closest to the halfway point between Mount Vernon, SD and IAD Airport is Chicago, IL, situated 650 miles from Mount Vernon, SD and 694 miles from IAD Airport. It would take 9 hours 28 mins to go from Mount Vernon to and 10 hours 54 mins to go from IAD to Chicago.