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

Distance from Iona, SD to Thomson, IL

Distance

566 mi

Time

11 hours 47 mins

Gas Cost

$53 - $103

There are 485.31 miles from Iona to Thomson in southeast direction and 566 miles (910.89 kilometers) by car, following the US-20 route.

Iona and Thomson are 11 hours 47 mins far apart, if you drive non-stop .

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

Iona, SD and Thomson, IL are in the same time zone (CDT). Current time in both locations is 1:06 pm.

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Lowest Price Rental Cars in Iona, SD

Planning on renting a car to go from Iona, SD to Thomson, 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 22.75 gallons of gas to cover the route between Iona, SD and Thomson, IL.

The estimated cost of gas to go from Iona to Thomson is $74.20.

During the route, an average car will release 445.64 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 Thomson, IL

If you want to meet halfway between Iona, SD and Thomson, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.453897 and -94.92498, or 42º 27' 14.0292" N, 94º 55' 29.928" W. This location is 283.19 miles away from Iona, SD and Thomson, IL and it would take approximately 5 hours 53 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lytton, IA, situated 291 miles from Iona, SD and 280 miles from Thomson, IL. It would take 6 hours 15 mins to go from Iona to Lytton and 5 hours 40 mins to go from Thomson to Lytton.