Distance between cities › USA › Montana › Grass Range, MT › Distance from Grass Range to Allison Book Hotels

Distance from Grass Range, MT to Allison, IA

Distance

1,023 mi

Time

18 hours

Gas Cost

$95 - $185

There are 835.57 miles from Grass Range to Allison in southeast direction and 1,023 miles (1,646.36 kilometers) by car, following the I-94 route.

Grass Range and Allison are 18 hours far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Allison, IA. The halfway point is Kadoka, SD.

Please note the time difference between Grass Range, MT and Allison, IA is 1 hour. The current time in Grass Range is 12:40 am and the current time in Allison is 1:40 am.

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Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Allison, IA? Here there are some offers to rent a car in Grass Range, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Grass Range »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 41.09 gallons of gas to cover the route between Grass Range, MT and Allison, IA.

The estimated cost of gas to go from Grass Range to Allison is $134.04.

During the route, an average car will release 805.04 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 Grass Range, MT and Allison, IA

If you want to meet halfway between Grass Range, MT and Allison, IA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.857456 and -101.402603, or 43º 51' 26.8416" N, 101º 24' 9.3708" W. This location is 511.58 miles away from Grass Range, MT and Allison, IA and it would take approximately 9 hours to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Kadoka, SD, situated 555 miles from Grass Range, MT and 519 miles from Allison, IA. It would take 9 hours 14 mins to go from Grass Range to Kadoka and 7 hours 15 mins to go from Allison to Kadoka.