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

Distance from Dewey, SD to Longlake, SD

Distance

437 mi

Time

8 hours 44 mins

Gas Cost

$39 - $76

There are 286.70 miles from Dewey to Longlake in northeast direction and 437 miles (703.28 kilometers) by car, following the I-90 and US-14 route.

Dewey and Longlake are 8 hours 44 mins far apart, if you drive non-stop .

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

Please note the time difference between Dewey, SD and Longlake, SD is 1 hour. The current time in Dewey is 1:54 am and the current time in Longlake is 2:54 am.

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Lowest Price Rental Cars in Dewey, SD

Planning on renting a car to go from Dewey, SD to Longlake, 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 17.54 gallons of gas to cover the route between Dewey, SD and Longlake, SD.

The estimated cost of gas to go from Dewey to Longlake is $54.98.

During the route, an average car will release 343.58 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 $3.14 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Dewey, SD and Longlake, SD

If you want to meet halfway between Dewey, SD and Longlake, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.895218 and -100.961700, or 43º 53' 42.7848" N, 100º 57' 42.12" W. This location is 218.33 miles away from Dewey, SD and Longlake, SD and it would take approximately 4 hours 22 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 221 miles from Longlake, SD. It would take 3 hours 44 mins to go from Dewey to Okaton and 4 hours 57 mins to go from Longlake to Okaton.