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

Distance from Custer, SD to Mercer, PA

Distance

1,377 mi

Time

1 day

Gas Cost

$128 - $249

There are 1,198.78 miles from Custer to Mercer in east direction and 1,377 miles (2,216.07 kilometers) by car, following the I-90 and US-14 route.

Custer and Mercer are 1 day far apart, if you drive non-stop .

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

Please note the time difference between Custer, SD and Mercer, PA is 2 hours. The current time in Custer is 5:50 am and the current time in Mercer is 7:50 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Mercer, 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 55.29 gallons of gas to cover the route between Custer, SD and Mercer, PA.

The estimated cost of gas to go from Custer to Mercer is $180.34.

During the route, an average car will release 1,083.17 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 Mercer, PA

If you want to meet halfway between Custer, SD and Mercer, PA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.901561 and -91.346531, or 43º 54' 5.6196" N, 91º 20' 47.5116" W. This location is 688.31 miles away from Custer, SD and Mercer, PA and it would take approximately 12 hours 16 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Dakota, MN, situated 665 miles from Custer, SD and 712 miles from Mercer, PA. It would take 11 hours 23 mins to go from Custer to Dakota and 13 hours 9 mins to go from Mercer to Dakota.