Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to Geff Book Hotels

Distance from Dewey, SD to Geff, IL

Distance

1,097 mi

Time

21 hours

Gas Cost

$102 - $199

There are 886.32 miles from Dewey to Geff in southeast direction and 1,097 miles (1,765.45 kilometers) by car, following the I-80 route.

Dewey and Geff are 21 hours far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Geff, IL.

Please note the time difference between Dewey, SD and Geff, IL is 1 hour. The current time in Dewey is 8:46 am and the current time in Geff is 9:46 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Geff, IL? Here there are some offers to rent a car in Dewey, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Dewey »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 44.04 gallons of gas to cover the route between Dewey, SD and Geff, IL.

The estimated cost of gas to go from Dewey to Geff is $143.67.

During the route, an average car will release 862.91 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 Dewey, SD and Geff, IL

If you want to meet halfway between Dewey, SD and Geff, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 40.690919 and -96.680636, or 40º 41' 27.3084" N, 96º 40' 50.2896" W. This location is 548.35 miles away from Dewey, SD and Geff, IL and it would take approximately 10 hours 30 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Roca, NE, situated 550 miles from Dewey, SD and 553 miles from Geff, IL. It would take 10 hours 32 mins to go from Dewey to Roca and 10 hours 36 mins to go from Geff to Roca.

Major City Closest to Halfway Point

The major city closest to the halfway point between Dewey, SD and Geff, IL is Lincoln, NE, situated 541 miles from Dewey, SD and 556 miles from Geff, IL. It would take 10 hours 26 mins to go from Dewey to Lincoln and 10 hours 47 mins to go from Geff to Lincoln.