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

Distance from Dewey, SD to Assumption, IL

Distance

1,031 mi

Time

19 hours 32 mins

Gas Cost

$96 - $187

There are 822.10 miles from Dewey to Assumption in southeast direction and 1,031 miles (1,659.23 kilometers) by car, following the I-80 route.

Dewey and Assumption are 19 hours 32 mins far apart, if you drive non-stop .

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

Please note the time difference between Dewey, SD and Assumption, IL is 1 hour. The current time in Dewey is 7:38 am and the current time in Assumption is 8:38 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Dewey, SD to Assumption, IL:

Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Assumption, 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 41.43 gallons of gas to cover the route between Dewey, SD and Assumption, IL.

The estimated cost of gas to go from Dewey to Assumption is $135.13.

During the route, an average car will release 811.61 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 Assumption, IL

If you want to meet halfway between Dewey, SD and Assumption, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 40.82196 and -97.08303, or 40º 49' 19.056" N, 97º 4' 58.908" W. This location is 515.75 miles away from Dewey, SD and Assumption, IL and it would take approximately 9 hours 46 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Milford, NE, situated 523 miles from Dewey, SD and 515 miles from Assumption, IL. It would take 10 hours 1 min to go from Dewey to Milford and 9 hours 42 mins to go from Assumption to Milford.

Major City Closest to Halfway Point

The major city closest to the halfway point between Dewey, SD and Assumption, IL is Lincoln, NE, situated 541 miles from Dewey, SD and 491 miles from Assumption, IL. It would take 10 hours 26 mins to go from Dewey to Lincoln and 9 hours 20 mins to go from Assumption to Lincoln.