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

Distance from Roberts, MT to Irene, SD

Distance

722 mi

Time

12 hours 40 mins

Gas Cost

$66 - $129

There are 614.52 miles from Roberts to Irene in southeast direction and 722 miles (1,161.95 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Roberts and Irene are 12 hours 40 mins far apart, if you drive non-stop .

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

Please note the time difference between Roberts, MT and Irene, SD is 1 hour. The current time in Roberts is 11:51 pm (Mar 11) and the current time in Irene is 12:51 am (Mar 12).

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Lowest Price Rental Cars in Roberts, MT

Planning on renting a car to go from Roberts, MT to Irene, 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 29.01 gallons of gas to cover the route between Roberts, MT and Irene, SD.

The estimated cost of gas to go from Roberts to Irene is $92.94.

During the route, an average car will release 568.34 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 Irene, SD

If you want to meet halfway between Roberts, MT and Irene, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.10423 and -103.203657, or 44º 6' 15.228" N, 103º 12' 13.1652" W. This location is 361.16 miles away from Roberts, MT and Irene, SD and it would take approximately 6 hours 20 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest city to the halfway point is Rapid City, SD, situated 364 miles from Roberts, MT and 362 miles from Irene, SD. It would take 6 hours 48 mins to go from Roberts to Rapid City and 5 hours 59 mins to go from Irene to Rapid City.