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

Distance from Reliance, SD to IAD Airport

Distance

1,394 mi

Time

1 day 1 hour

Gas Cost

$130 - $253

Helpful Inaccurate

There are 1,192.78 miles from Reliance to Washington Dulles International Airport (IAD) in southeast direction and 1,394 miles (2,243.43 kilometers) by car, following the I-90 route.

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

This is the fastest route from Reliance, SD to IAD Airport. The halfway point is Sleepy Hollow, IL.

Please note the time difference between Reliance, SD and IAD Airport is 1 hour. The current time in Reliance is 7:29 am and the current time in IAD Airport is 8:29 am.

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Lowest Price Rental Cars in Reliance, SD

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Reliance »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 55.99 gallons of gas to cover the route between Reliance, SD and IAD Airport.

The estimated cost of gas to go from Reliance to IAD Airport is $182.64.

During the route, an average car will release 1,096.93 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 Reliance, SD and IAD Airport

If you want to meet halfway between Reliance, 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 42.100929 and -88.308273, or 42º 6' 3.3444" N, 88º 18' 29.7828" W. This location is 697.06 miles away from Reliance, SD and IAD Airport and it would take approximately 12 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 Sleepy Hollow, IL, situated 684 miles from Reliance, SD and 734 miles from IAD Airport. It would take 9 hours 42 mins to go from Reliance to Sleepy Hollow and 11 hours 40 mins to go from IAD to Sleepy Hollow.

Major City Closest to Halfway Point

The major city closest to the halfway point between Reliance, SD and IAD Airport is Aurora, IL, situated 702 miles from Reliance, SD and 733 miles from IAD Airport. It would take 10 hours 10 mins to go from Reliance to and 11 hours 35 mins to go from IAD to Aurora.