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

Distance from Grass Range, MT to Academy, SD

Distance

645 mi

Time

11 hours 50 mins

Gas Cost

$54 - $105

There are 533.03 miles from Grass Range to Academy in southeast direction and 645 miles (1,038.03 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Grass Range and Academy are 11 hours 50 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Academy, SD. The halfway point is Pine Haven, WY.

Please note the time difference between Grass Range, MT and Academy, SD is 1 hour. The current time in Grass Range is 12:16 am and the current time in Academy is 1:16 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Grass Range, MT to Academy, SD:

Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Academy, SD? 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 25.92 gallons of gas to cover the route between Grass Range, MT and Academy, SD.

The estimated cost of gas to go from Grass Range to Academy is $75.69.

During the route, an average car will release 507.84 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 $2.92 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 Academy, SD

If you want to meet halfway between Grass Range, MT and Academy, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.293415 and -104.649261, or 44º 17' 36.294" N, 104º 38' 57.3396" W. This location is 322.71 miles away from Grass Range, MT and Academy, SD and it would take approximately 5 hours 55 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Pine Haven, WY, situated 364 miles from Grass Range, MT and 349 miles from Academy, SD. It would take 6 hours 38 mins to go from Grass Range to Pine Haven and 5 hours 24 mins to go from Academy to Pine Haven.