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

Distance from Dewey, SD to Avon, SD

Distance

408 mi

Time

7 hours 50 mins

Gas Cost

$36 - $70

There are 303.04 miles from Dewey to Avon in east direction and 408 miles (656.61 kilometers) by car, following the I-90 and US-14 route.

Dewey and Avon are 7 hours 50 mins far apart, if you drive non-stop .

This is the fastest route from Dewey, SD to Avon, SD. The halfway point is Okaton, SD.

Please note the time difference between Dewey, SD and Avon, SD is 1 hour. The current time in Dewey is 12:18 am and the current time in Avon is 1:18 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Avon, SD? 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 16.39 gallons of gas to cover the route between Dewey, SD and Avon, SD.

The estimated cost of gas to go from Dewey to Avon is $50.77.

During the route, an average car will release 321.20 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 $3.10 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Dewey, SD and Avon, SD

If you want to meet halfway between Dewey, SD and Avon, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.900787 and -101.045441, or 43º 54' 2.8332" N, 101º 2' 43.5876" W. This location is 204.11 miles away from Dewey, SD and Avon, SD and it would take approximately 3 hours 55 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Okaton, SD, situated 217 miles from Dewey, SD and 191 miles from Avon, SD. It would take 3 hours 44 mins to go from Dewey to Okaton and 3 hours 8 mins to go from Avon to Okaton.