Distance between cities › USA › Montana › Roberts, MT › Distance from Roberts to Stephan Book Hotels

Distance from Roberts, MT to Stephan, SD

Distance

587 mi

Time

10 hours 37 mins

Gas Cost

$54 - $104

There are 482.10 miles from Roberts to Stephan in east direction and 587 miles (944.68 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Roberts and Stephan are 10 hours 37 mins far apart, if you drive non-stop .

This is the fastest route from Roberts, MT to Stephan, SD.

Please note the time difference between Roberts, MT and Stephan, SD is 1 hour. The current time in Roberts is 10:33 pm and the current time in Stephan is 11:33 pm.

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Lowest Price Rental Cars in Roberts, MT

Planning on renting a car to go from Roberts, MT to Stephan, SD? Here there are some offers to rent a car in Roberts, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Roberts »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 23.56 gallons of gas to cover the route between Roberts, MT and Stephan, SD.

The estimated cost of gas to go from Roberts to Stephan is $75.47.

During the route, an average car will release 461.51 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Roberts, MT and Stephan, SD

If you want to meet halfway between Roberts, MT and Stephan, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.869684 and -104.15238, or 44º 52' 10.8624" N, 104º 9' 8.568" W. This location is 293.27 miles away from Roberts, MT and Stephan, SD and it would take approximately 5 hours 18 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Aladdin, WY, situated 327 miles from Roberts, MT and 293 miles from Stephan, SD. It would take 6 hours 8 mins to go from Roberts to Aladdin and 5 hours 7 mins to go from Stephan to Aladdin.