Distance between cities › USA › Illinois › Mason, IL › Distance from Mason to Ralph Book Hotels

Distance from Mason, IL to Ralph, SD

Distance

1,166 mi

Time

21 hours 45 mins

Gas Cost

$109 - $211

There are 873.11 miles from Mason to Ralph in northwest direction and 1,166 miles (1,876.50 kilometers) by car, following the I-90 route.

Mason and Ralph are 21 hours 45 mins far apart, if you drive non-stop .

This is the fastest route from Mason, IL to Ralph, SD.

Please note the time difference between Mason, IL and Ralph, SD is 1 hour. The current time in Mason is 10:51 pm and the current time in Ralph is 9:51 pm.

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Lowest Price Rental Cars in Mason, IL

Planning on renting a car to go from Mason, IL to Ralph, SD? Here there are some offers to rent a car in Mason, IL

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Mason »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 46.84 gallons of gas to cover the route between Mason, IL and Ralph, SD.

The estimated cost of gas to go from Mason to Ralph is $152.79.

During the route, an average car will release 917.70 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 Mason, IL and Ralph, SD

If you want to meet halfway between Mason, IL and Ralph, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.720945 and -96.045959, or 41º 43' 15.402" N, 96º 2' 45.4524" W. This location is 583.16 miles away from Mason, IL and Ralph, SD and it would take approximately 10 hours 52 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Mondamin, IA, situated 582 miles from Mason, IL and 587 miles from Ralph, SD. It would take 10 hours 35 mins to go from Mason to Mondamin and 11 hours 15 mins to go from Ralph to Mondamin.