Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Grassflat Book Hotels

Distance from Custer, SD to Grassflat, PA

Distance

1,496 mi

Time

1 day 2 hours

Gas Cost

$139 - $271

There are 1,309.24 miles from Custer to Grassflat in east direction and 1,496 miles (2,407.58 kilometers) by car, following the I-90 and US-14 route.

Custer and Grassflat are 1 day 2 hours far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Grassflat, PA.

Please note the time difference between Custer, SD and Grassflat, PA is 2 hours. The current time in Custer is 1:17 am and the current time in Grassflat is 3:17 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Grassflat, PA? Here there are some offers to rent a car in Custer, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Custer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 60.08 gallons of gas to cover the route between Custer, SD and Grassflat, PA.

The estimated cost of gas to go from Custer to Grassflat is $195.97.

During the route, an average car will release 1,177.04 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 Custer, SD and Grassflat, PA

If you want to meet halfway between Custer, SD and Grassflat, PA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.934466 and -90.291481, or 43º 56' 4.0776" N, 90º 17' 29.3316" W. This location is 747.96 miles away from Custer, SD and Grassflat, PA and it would take approximately 13 hours 21 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Camp Douglas, WI, situated 726 miles from Custer, SD and 771 miles from Grassflat, PA. It would take 12 hours 29 mins to go from Custer to Camp Douglas and 14 hours 15 mins to go from Grassflat to Camp Douglas.