Distance between cities › USA › South Dakota › Mount Vernon, SD › Distance from Mount Vernon to Ralph Book Hotels

Distance from Mount Vernon, SD to Ralph, SD

Distance

363 mi

Time

7 hours 33 mins

Gas Cost

$33 - $63

There are 275.60 miles from Mount Vernon to Ralph in northwest direction and 363 miles (584.19 kilometers) by car, following the I-90 route.

Mount Vernon and Ralph are 7 hours 33 mins far apart, if you drive non-stop .

This is the fastest route from Mount Vernon, SD to Ralph, SD.

Please note the time difference between Mount Vernon, SD and Ralph, SD is 1 hour. The current time in Mount Vernon is 1:55 pm and the current time in Ralph is 12:55 pm.

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Lowest Price Rental Cars in Mount Vernon, SD

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Mount Vernon »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 14.58 gallons of gas to cover the route between Mount Vernon, SD and Ralph, SD.

The estimated cost of gas to go from Mount Vernon to Ralph is $45.72.

During the route, an average car will release 285.70 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 $3.14 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Mount Vernon, SD and Ralph, SD

If you want to meet halfway between Mount Vernon, SD 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 44.371732 and -101.069444, or 44º 22' 18.2352" N, 101º 4' 9.9984" W. This location is 181.55 miles away from Mount Vernon, SD and Ralph, SD and it would take approximately 3 hours 46 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Hayes, SD, situated 173 miles from Mount Vernon, SD and 190 miles from Ralph, SD. It would take 2 hours 58 mins to go from Mount Vernon to Hayes and 4 hours 35 mins to go from Ralph to Hayes.