Distance between cities › USA › South Dakota › Dewey, SD › Distance from Dewey to Conowingo Book Hotels

Distance from Dewey, SD to Conowingo, MD

Distance

1,720 mi

Time

1 day 7 hours

Gas Cost

$160 - $312

There are 1,457.75 miles from Dewey to Conowingo in east direction and 1,720 miles (2,768.07 kilometers) by car, following the I-90 and US-14 route.

Dewey and Conowingo are 1 day 7 hours far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Conowingo, MD.

Please note the time difference between Dewey, SD and Conowingo, MD is 2 hours. The current time in Dewey is 6:03 am and the current time in Conowingo is 8:03 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Conowingo, MD? Here there are some offers to rent a car in Dewey, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Dewey »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 69.08 gallons of gas to cover the route between Dewey, SD and Conowingo, MD.

The estimated cost of gas to go from Dewey to Conowingo is $225.34.

During the route, an average car will release 1,353.45 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 Dewey, SD and Conowingo, MD

If you want to meet halfway between Dewey, SD and Conowingo, MD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.440241 and -89.488097, or 43º 26' 24.8676" N, 89º 29' 17.1492" W. This location is 860.06 miles away from Dewey, SD and Conowingo, MD and it would take approximately 15 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 Poynette, WI, situated 839 miles from Dewey, SD and 890 miles from Conowingo, MD. It would take 14 hours 59 mins to go from Dewey to Poynette and 16 hours 48 mins to go from Conowingo to Poynette.

Major City Closest to Halfway Point

The major city closest to the halfway point between Dewey, SD and Conowingo, MD is Madison, WI, situated 861 miles from Dewey, SD and 867 miles from Conowingo, MD. It would take 15 hours 30 mins to go from Dewey to Madison and 16 hours 27 mins to go from Conowingo to Madison.