Distance between cities › USA › South Dakota › Iona, SD › Distance from Iona to Jefferson Book Hotels

Distance from Iona, SD to Jefferson, MD

Distance

1,402 mi

Time

1 day 1 hour

Gas Cost

$131 - $254

There are 1,165.96 miles from Iona to Jefferson in southeast direction and 1,402 miles (2,256.30 kilometers) by car, following the I-90 route.

Iona and Jefferson are 1 day 1 hour far apart, if you drive non-stop .

This is the fastest route from Iona, SD to Jefferson, MD. The halfway point is Marengo, IL.

Please note the time difference between Iona, SD and Jefferson, MD is 1 hour. The current time in Iona is 10:12 am and the current time in Jefferson is 11:12 am.

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Lowest Price Rental Cars in Iona, SD

Planning on renting a car to go from Iona, SD to Jefferson, MD? Here there are some offers to rent a car in Iona, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Iona »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 56.31 gallons of gas to cover the route between Iona, SD and Jefferson, MD.

The estimated cost of gas to go from Iona to Jefferson is $183.69.

During the route, an average car will release 1,103.24 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 Iona, SD and Jefferson, MD

If you want to meet halfway between Iona, SD and Jefferson, MD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.174561 and -88.632919, or 42º 10' 28.4196" N, 88º 37' 58.5084" W. This location is 701.07 miles away from Iona, SD and Jefferson, MD and it would take approximately 12 hours 54 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Marengo, IL, situated 688 miles from Iona, SD and 724 miles from Jefferson, MD. It would take 10 hours 23 mins to go from Iona to Marengo and 11 hours 1 min to go from Jefferson to Marengo.

Major City Closest to Halfway Point

The major city closest to the halfway point between Iona, SD and Jefferson, MD is Rockford, IL, situated 672 miles from Iona, SD and 751 miles from Jefferson, MD. It would take 10 hours 7 mins to go from Iona to and 11 hours 25 mins to go from Jefferson to Rockford.