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

Distance from Webster, SD to Rio, IL

Distance

636 mi

Time

11 hours 19 mins

Gas Cost

$59 - $115

There are 461.92 miles from Webster to Rio in southeast direction and 636 miles (1,023.54 kilometers) by car, following the I-29 and US-81 route.

Webster and Rio are 11 hours 19 mins far apart, if you drive non-stop .

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

Webster, SD and Rio, IL are in the same time zone (CDT). Current time in both locations is 10:01 am.

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Lowest Price Rental Cars in Webster, SD

Planning on renting a car to go from Webster, SD to Rio, 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 25.55 gallons of gas to cover the route between Webster, SD and Rio, IL.

The estimated cost of gas to go from Webster to Rio is $83.35.

During the route, an average car will release 500.62 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 Rio, IL

If you want to meet halfway between Webster, SD and Rio, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.498059 and -95.309243, or 41º 29' 53.0124" N, 95º 18' 33.2748" W. This location is 318.13 miles away from Webster, SD and Rio, IL and it would take approximately 5 hours 39 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Avoca, IA, situated 343 miles from Webster, SD and 296 miles from Rio, IL. It would take 5 hours 48 mins to go from Webster to Avoca and 5 hours 36 mins to go from Rio to Avoca.