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

Distance from Roberts, MT to Marty, SD

Distance

670 mi

Time

12 hours 6 mins

Gas Cost

$61 - $119

There are 555.90 miles from Roberts to Marty in southeast direction and 670 miles (1,078.26 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Roberts and Marty are 12 hours 6 mins far apart, if you drive non-stop .

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

Please note the time difference between Roberts, MT and Marty, SD is 1 hour. The current time in Roberts is 10:40 pm and the current time in Marty is 11:40 pm.

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Lowest Price Rental Cars in Roberts, MT

Planning on renting a car to go from Roberts, MT to Marty, 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 26.93 gallons of gas to cover the route between Roberts, MT and Marty, SD.

The estimated cost of gas to go from Roberts to Marty is $86.27.

During the route, an average car will release 527.53 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 Marty, SD

If you want to meet halfway between Roberts, MT and Marty, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.434424 and -103.5799, or 44º 26' 3.9264" N, 103º 34' 47.64" W. This location is 335.23 miles away from Roberts, MT and Marty, SD and it would take approximately 6 hours 3 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Whitewood, SD, situated 328 miles from Roberts, MT and 343 miles from Marty, SD. It would take 6 hours 11 mins to go from Roberts to Whitewood and 5 hours 57 mins to go from Marty to Whitewood.