Distance between cities › USA › Illinois › Rio, IL › Distance from Rio to Buffalo Book Hotels

Distance from Rio, IL to Buffalo, MT

Distance

1,264 mi

Time

22 hours 24 mins

Gas Cost

$118 - $229

There are 1,040.19 miles from Rio to Buffalo in northwest direction and 1,264 miles (2,034.21 kilometers) by car, following the I-90 route.

Rio and Buffalo are 22 hours 24 mins far apart, if you drive non-stop .

This is the fastest route from Rio, IL to Buffalo, MT. The halfway point is Eckelson, ND.

Please note the time difference between Rio, IL and Buffalo, MT is 1 hour. The current time in Rio is 12:05 pm and the current time in Buffalo is 11:05 am.

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Lowest Price Rental Cars in Rio, IL

Planning on renting a car to go from Rio, IL to Buffalo, MT? Here there are some offers to rent a car in Rio, IL

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Rio »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 50.75 gallons of gas to cover the route between Rio, IL and Buffalo, MT.

The estimated cost of gas to go from Rio to Buffalo is $165.56.

During the route, an average car will release 994.37 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 Rio, IL and Buffalo, MT

If you want to meet halfway between Rio, IL and Buffalo, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.901199 and -98.293594, or 46º 54' 4.3164" N, 98º 17' 36.9384" W. This location is 631.89 miles away from Rio, IL and Buffalo, MT and it would take approximately 11 hours 12 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Eckelson, ND, situated 710 miles from Rio, IL and 590 miles from Buffalo, MT. It would take 10 hours 45 mins to go from Rio to Eckelson and 8 hours 47 mins to go from Buffalo to Eckelson.