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

Distance from Mount Vernon, SD to Harmon, OK

Distance

616 mi

Time

13 hours 2 mins

Gas Cost

$57 - $112

There are 527.24 miles from Mount Vernon to Harmon in south direction and 616 miles (991.36 kilometers) by car, following the US-183 route.

Mount Vernon and Harmon are 13 hours 2 mins far apart, if you drive non-stop .

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

Mount Vernon, SD and Harmon, OK are in the same time zone (CDT). Current time in both locations is 6:45 am.

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Lowest Price Rental Cars in Mount Vernon, SD

Planning on renting a car to go from Mount Vernon, SD to Harmon, OK? 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 24.73 gallons of gas to cover the route between Mount Vernon, SD and Harmon, OK.

The estimated cost of gas to go from Mount Vernon to Harmon is $80.67.

During the route, an average car will release 484.54 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 Mount Vernon, SD and Harmon, OK

If you want to meet halfway between Mount Vernon, SD and Harmon, OK or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 40.281127 and -99.368278, or 40º 16' 52.0572" N, 99º 22' 5.8008" W. This location is 307.91 miles away from Mount Vernon, SD and Harmon, OK and it would take approximately 6 hours 31 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Ragan, NE, situated 303 miles from Mount Vernon, SD and 322 miles from Harmon, OK. It would take 6 hours 14 mins to go from Mount Vernon to Ragan and 6 hours 59 mins to go from Harmon to Ragan.