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

Distance from Iona, SD to Castleton, IL

Distance

642 mi

Time

12 hours 46 mins

Gas Cost

$60 - $116

There are 523.84 miles from Iona to Castleton in southeast direction and 642 miles (1,033.20 kilometers) by car, following the I-80 route.

Iona and Castleton are 12 hours 46 mins far apart, if you drive non-stop .

This is the fastest route from Iona, SD to Castleton, IL.

Iona, SD and Castleton, IL are in the same time zone (CDT). Current time in both locations is 9:58 am.

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Lowest Price Rental Cars in Iona, SD

Planning on renting a car to go from Iona, SD to Castleton, IL? 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 25.80 gallons of gas to cover the route between Iona, SD and Castleton, IL.

The estimated cost of gas to go from Iona to Castleton is $84.15.

During the route, an average car will release 505.40 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 Castleton, IL

If you want to meet halfway between Iona, SD and Castleton, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.49714 and -94.986604, or 41º 29' 49.704" N, 94º 59' 11.7744" W. This location is 321.16 miles away from Iona, SD and Castleton, IL and it would take approximately 6 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 Brayton, IA, situated 335 miles from Iona, SD and 314 miles from Castleton, IL. It would take 6 hours 54 mins to go from Iona to Brayton and 6 hours 2 mins to go from Castleton to Brayton.