Distance between cities › USA › South Dakota › Armour, SD › Distance from Armour to Rosebud Book Hotels

Distance from Armour, SD to Rosebud, MT

Distance

540 mi

Time

9 hours 55 mins

Gas Cost

$50 - $98

There are 446.20 miles from Armour to Rosebud in northwest direction and 540 miles (869.05 kilometers) by car, following the I-90 route.

Armour and Rosebud are 9 hours 55 mins far apart, if you drive non-stop .

This is the fastest route from Armour, SD to Rosebud, MT.

Please note the time difference between Armour, SD and Rosebud, MT is 1 hour. The current time in Armour is 8:40 am and the current time in Rosebud is 7:40 am.

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Lowest Price Rental Cars in Armour, SD

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Armour »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 21.68 gallons of gas to cover the route between Armour, SD and Rosebud, MT.

The estimated cost of gas to go from Armour to Rosebud is $70.72.

During the route, an average car will release 424.76 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 Armour, SD and Rosebud, MT

If you want to meet halfway between Armour, SD and Rosebud, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.103653 and -102.832072, or 44º 6' 13.1508" N, 102º 49' 55.4592" W. This location is 269.92 miles away from Armour, SD and Rosebud, MT and it would take approximately 4 hours 57 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is New Underwood, SD, situated 262 miles from Armour, SD and 280 miles from Rosebud, MT. It would take 4 hours 21 mins to go from Armour to New Underwood and 5 hours 40 mins to go from Rosebud to New Underwood.