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

Distance from Webster, SD to Alpha, IL

Distance

629 mi

Time

11 hours 8 mins

Gas Cost

$59 - $114

There are 458.94 miles from Webster to Alpha in southeast direction and 629 miles (1,012.28 kilometers) by car, following the I-29 and US-81 route.

Webster and Alpha are 11 hours 8 mins far apart, if you drive non-stop .

This is the fastest route from Webster, SD to Alpha, IL. The halfway point is Jolley, IA.

Webster, SD and Alpha, IL are in the same time zone (CDT). Current time in both locations is 8:32 am.

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Lowest Price Rental Cars in Webster, SD

Planning on renting a car to go from Webster, SD to Alpha, 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 25.28 gallons of gas to cover the route between Webster, SD and Alpha, IL.

The estimated cost of gas to go from Webster to Alpha is $82.45.

During the route, an average car will release 495.21 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 Alpha, IL

If you want to meet halfway between Webster, SD and Alpha, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.449490 and -94.670334, or 42º 26' 58.164" N, 94º 40' 13.2024" W. This location is 314.69 miles away from Webster, SD and Alpha, IL and it would take approximately 5 hours 34 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Jolley, IA, situated 319 miles from Webster, SD and 298 miles from Alpha, IL. It would take 4 hours 42 mins to go from Webster to Jolley and 4 hours 37 mins to go from Alpha to Jolley.