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

Distance from Rio, IL to Mildred, MT

Distance

1,058 mi

Time

19 hours 10 mins

Gas Cost

$99 - $192

There are 818.90 miles from Rio to Mildred in northwest direction and 1,058 miles (1,702.69 kilometers) by car, following the I-94 route.

Rio and Mildred are 19 hours 10 mins far apart, if you drive non-stop .

This is the fastest route from Rio, IL to Mildred, MT.

Please note the time difference between Rio, IL and Mildred, MT is 1 hour. The current time in Rio is 4:30 pm and the current time in Mildred is 3:30 pm.

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Lowest Price Rental Cars in Rio, IL

Planning on renting a car to go from Rio, IL to Mildred, 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 42.49 gallons of gas to cover the route between Rio, IL and Mildred, MT.

The estimated cost of gas to go from Rio to Mildred is $138.60.

During the route, an average car will release 832.43 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 Mildred, MT

If you want to meet halfway between Rio, IL and Mildred, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.346931 and -96.142325, or 46º 20' 48.9516" N, 96º 8' 32.37" W. This location is 528.98 miles away from Rio, IL and Mildred, MT and it would take approximately 9 hours 35 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Elizabeth, MN, situated 575 miles from Rio, IL and 488 miles from Mildred, MT. It would take 10 hours 52 mins to go from Rio to Elizabeth and 8 hours 24 mins to go from Mildred to Elizabeth.