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

Distance from Mount Vernon, SD to Long Key, FL

Distance

1,999 mi

Time

1 day 12 hours

Gas Cost

$188 - $366

There are 1,634.37 miles from Mount Vernon to Long Key in southeast direction and 1,999 miles (3,217.08 kilometers) by car, following the I-29 route.

Mount Vernon and Long Key are 1 day 12 hours far apart, if you drive non-stop .

This is the fastest route from Mount Vernon, SD to Long Key, FL.

Please note the time difference between Mount Vernon, SD and Long Key, FL is 1 hour. The current time in Mount Vernon is 1:53 am and the current time in Long Key is 2:53 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 Long Key, FL? 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 80.29 gallons of gas to cover the route between Mount Vernon, SD and Long Key, FL.

The estimated cost of gas to go from Mount Vernon to Long Key is $264.24.

During the route, an average car will release 1,573.08 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 $3.29 per gallon of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Mount Vernon, SD and Long Key, FL

If you want to meet halfway between Mount Vernon, SD and Long Key, FL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 36.649822 and -87.355278, or 36º 38' 59.3592" N, 87º 21' 19.0008" W. This location is 999.64 miles away from Mount Vernon, SD and Long Key, FL and it would take approximately 18 hours 23 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Oak Grove, KY, situated 946 miles from Mount Vernon, SD and 1,057 miles from Long Key, FL. It would take 17 hours 7 mins to go from Mount Vernon to Oak Grove and 19 hours 49 mins to go from Long Key to Oak Grove.

Major City Closest to Halfway Point

The major city closest to the halfway point between Mount Vernon, SD and Long Key, FL is Clarksville, TN, situated 957 miles from Mount Vernon, SD and 1,047 miles from Long Key, FL. It would take 17 hours 26 mins to go from Mount Vernon to Clarksville and 19 hours 39 mins to go from Long Key to Clarksville.

Major Cities Along the Route

Some other major cities along the route include Port Saint Lucie, FL, Miami Gardens, FL, Pembroke Pines, FL, Saint Louis, MO, Miramar, FL, Pompano Beach, FL and Columbia, MO.