Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to O Brien Book Hotels

Distance from Dewey, SD to O Brien, FL

Distance

1,829 mi

Time

1 day 10 hours

Gas Cost

$170 - $331

There are 1,486.58 miles from Dewey to O Brien in southeast direction and 1,829 miles (2,943.49 kilometers) by car, following the I-80 route.

Dewey and O Brien are 1 day 10 hours far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to O Brien, FL.

Please note the time difference between Dewey, SD and O Brien, FL is 2 hours. The current time in Dewey is 3:15 am and the current time in O Brien is 5:15 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to O Brien, 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 73.44 gallons of gas to cover the route between Dewey, SD and O Brien, FL.

The estimated cost of gas to go from Dewey to O Brien is $239.56.

During the route, an average car will release 1,438.82 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 O Brien, FL

If you want to meet halfway between Dewey, SD and O Brien, FL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.956951 and -92.167293, or 38º 57' 25.0236" N, 92º 10' 2.2548" W. This location is 914.32 miles away from Dewey, SD and O Brien, FL and it would take approximately 17 hours 7 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest and also the major city is Columbia, MO, situated 863.61 miles from Dewey, SD and 967.35 miles from O Brien, FL. It would take 16 hours 15 mins to go from Dewey to Columbia and 18 hours 5 mins to go from O Brien to Columbia.