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

Distance from Grass Range, MT to Onaka, SD

Distance

578 mi

Time

10 hours 35 mins

Gas Cost

$54 - $105

There are 464.60 miles from Grass Range to Onaka in southeast direction and 578 miles (930.20 kilometers) by car, following the MT 200 route.

Grass Range and Onaka are 10 hours 35 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Onaka, SD.

Please note the time difference between Grass Range, MT and Onaka, SD is 1 hour. The current time in Grass Range is 3:06 am and the current time in Onaka is 4:06 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 Onaka, 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 23.22 gallons of gas to cover the route between Grass Range, MT and Onaka, SD.

The estimated cost of gas to go from Grass Range to Onaka is $75.75.

During the route, an average car will release 454.95 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 Onaka, SD

If you want to meet halfway between Grass Range, MT and Onaka, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.921471 and -103.510711, or 46º 55' 17.2956" N, 103º 30' 38.5596" W. This location is 289.11 miles away from Grass Range, MT and Onaka, SD and it would take approximately 5 hours 17 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Medora, ND, situated 276 miles from Grass Range, MT and 302 miles from Onaka, SD. It would take 4 hours 57 mins to go from Grass Range to Medora and 5 hours 44 mins to go from Onaka to Medora.