Distance between cities › USA › South Dakota › Webster, SD › Distance from Webster to Round Lake Book Hotels

Distance from Webster, SD to Round Lake, IL

Distance

608 mi

Time

11 hours 30 mins

Gas Cost

$57 - $110

There are 512.45 miles from Webster to Round Lake in southeast direction and 608 miles (978.48 kilometers) by car, following the I-94 route.

Webster and Round Lake are 11 hours 30 mins far apart, if you drive non-stop .

This is the fastest route from Webster, SD to Round Lake, IL.

Webster, SD and Round Lake, IL are in the same time zone (CDT). Current time in both locations is 10:14 am.

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Lowest Price Rental Cars in Webster, SD

Planning on renting a car to go from Webster, SD to Round Lake, IL? Here there are some offers to rent a car in Webster, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Webster »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 24.42 gallons of gas to cover the route between Webster, SD and Round Lake, IL.

The estimated cost of gas to go from Webster to Round Lake is $79.67.

During the route, an average car will release 478.53 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 Webster, SD and Round Lake, IL

If you want to meet halfway between Webster, SD and Round Lake, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.938119 and -92.351633, or 44º 56' 17.2284" N, 92º 21' 5.8788" W. This location is 304.09 miles away from Webster, SD and Round Lake, IL and it would take approximately 5 hours 45 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Eau Galle, WI, situated 292 miles from Webster, SD and 320 miles from Round Lake, IL. It would take 5 hours 41 mins to go from Webster to Eau Galle and 5 hours 59 mins to go from Round Lake to Eau Galle.