Distance between cities › USA › South Dakota › Madison, SD › Distance from Madison to Dewar Book Hotels

Distance from Madison, SD to Dewar, IA

Distance

355 mi

Time

6 hours 38 mins

Gas Cost

$33 - $64

There are 266.62 miles from Madison to Dewar in southeast direction and 355 miles (571.32 kilometers) by car, following the I-90 route.

Madison and Dewar are 6 hours 38 mins far apart, if you drive non-stop .

This is the fastest route from Madison, SD to Dewar, IA.

Madison, SD and Dewar, IA are in the same time zone (CDT). Current time in both locations is 7:45 am.

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Lowest Price Rental Cars in Madison, SD

Planning on renting a car to go from Madison, SD to Dewar, IA? Here there are some offers to rent a car in Madison, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Madison »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 14.24 gallons of gas to cover the route between Madison, SD and Dewar, IA.

The estimated cost of gas to go from Madison to Dewar is $46.45.

During the route, an average car will release 278.99 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 Madison, SD and Dewar, IA

If you want to meet halfway between Madison, SD and Dewar, IA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.666336 and -94.306444, or 43º 39' 58.8096" N, 94º 18' 23.1984" W. This location is 177.29 miles away from Madison, SD and Dewar, IA and it would take approximately 3 hours 19 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Granada, MN, situated 170 miles from Madison, SD and 189 miles from Dewar, IA. It would take 3 hours 7 mins to go from Madison to Granada and 3 hours 38 mins to go from Dewar to Granada.