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

Distance from Armour, SD to Antelope, MT

Distance

651 mi

Time

12 hours 6 mins

Gas Cost

$61 - $118

There are 472.70 miles from Armour to Antelope in northwest direction and 651 miles (1,047.68 kilometers) by car, following the I-94 route.

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

This is the fastest route from Armour, SD to Antelope, MT. The halfway point is Whitewood, SD.

Please note the time difference between Armour, SD and Antelope, MT is 1 hour. The current time in Armour is 5:58 am and the current time in Antelope is 4:58 am.

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Lowest Price Rental Cars in Armour, SD

Planning on renting a car to go from Armour, SD to Antelope, 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 26.14 gallons of gas to cover the route between Armour, SD and Antelope, MT.

The estimated cost of gas to go from Armour to Antelope is $85.27.

During the route, an average car will release 512.13 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 Antelope, MT

If you want to meet halfway between Armour, SD and Antelope, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.498734 and -103.644897, or 44º 29' 55.4424" N, 103º 38' 41.6292" W. This location is 325.44 miles away from Armour, SD and Antelope, MT 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 317 miles from Armour, SD and 376 miles from Antelope, MT. It would take 4 hours 21 mins to go from Armour to Whitewood and 6 hours 54 mins to go from Antelope to Whitewood.