Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to Siesta Key Book Hotels

Distance from Dewey, SD to Siesta Key, FL

Distance

2,052 mi

Time

1 day 14 hours

Gas Cost

$191 - $372

There are 1,642.43 miles from Dewey to Siesta Key in southeast direction and 2,052 miles (3,302.37 kilometers) by car, following the I-75 and GA 540 route.

Dewey and Siesta Key are 1 day 14 hours far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Siesta Key, FL.

Please note the time difference between Dewey, SD and Siesta Key, FL is 2 hours. The current time in Dewey is 8:07 am and the current time in Siesta Key is 10:07 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Siesta Key, FL? Here there are some offers to rent a car in Dewey, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Dewey »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 82.41 gallons of gas to cover the route between Dewey, SD and Siesta Key, FL.

The estimated cost of gas to go from Dewey to Siesta Key is $268.83.

During the route, an average car will release 1,614.63 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 Dewey, SD and Siesta Key, FL

If you want to meet halfway between Dewey, SD and Siesta Key, FL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.78698 and -90.535008, or 38º 47' 13.128" N, 90º 32' 6.0288" W. This location is 1,026.04 miles away from Dewey, SD and Siesta Key, FL and it would take approximately 19 hours 5 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Saint Charles, MO, situated 965 miles from Dewey, SD and 1,089 miles from Siesta Key, FL. It would take 18 hours 16 mins to go from Dewey to Saint Charles and 20 hours 1 min to go from Siesta Key to Saint Charles.

Major City Closest to Halfway Point

The major city closest to the halfway point between Dewey, SD and Siesta Key, FL is Saint Louis, MO, situated 986 miles from Dewey, SD and 1,068 miles from Siesta Key, FL. It would take 18 hours 41 mins to go from Dewey to Saint Louis and 19 hours 34 mins to go from Siesta Key to Saint Louis.