Distance between cities › USA › Illinois › Ruma, IL › Distance from Ruma to Big Arm Book Hotels

Distance from Ruma, IL to Big Arm, MT

Distance

1,729 mi

Time

1 day 6 hours

Gas Cost

$163 - $316

There are 1,389.73 miles from Ruma to Big Arm in northwest direction and 1,729 miles (2,782.56 kilometers) by car, following the I-90 route.

Ruma and Big Arm are 1 day 6 hours far apart, if you drive non-stop .

This is the fastest route from Ruma, IL to Big Arm, MT.

Please note the time difference between Ruma, IL and Big Arm, MT is 1 hour. The current time in Ruma is 1:59 am and the current time in Big Arm is 12:59 am.

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Lowest Price Rental Cars in Ruma, IL

Planning on renting a car to go from Ruma, IL to Big Arm, MT? Here there are some offers to rent a car in Ruma, IL

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Ruma »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 69.43 gallons of gas to cover the route between Ruma, IL and Big Arm, MT.

The estimated cost of gas to go from Ruma to Big Arm is $228.49.

During the route, an average car will release 1,360.24 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 $3.29 per gallon of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Ruma, IL and Big Arm, MT

If you want to meet halfway between Ruma, IL and Big Arm, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.845745 and -101.509601, or 43º 50' 44.682" N, 101º 30' 34.5636" W. This location is 864.38 miles away from Ruma, IL and Big Arm, MT and it would take approximately 15 hours 9 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Kadoka, SD, situated 897 miles from Ruma, IL and 833 miles from Big Arm, MT. It would take 15 hours 51 mins to go from Ruma to Kadoka and 14 hours 32 mins to go from Big Arm to Kadoka.