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

Distance from Custer, SD to Williams, AZ

Distance

1,074 mi

Time

20 hours 5 mins

Gas Cost

$100 - $195

There are 744.82 miles from Custer to Williams in southwest direction and 1,074 miles (1,728.44 kilometers) by car, following the I-70 route.

Custer and Williams are 20 hours 5 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Williams, AZ. The halfway point is Silt, CO.

Please note the time difference between Custer, SD and Williams, AZ is 1 hour. The current time in Custer is 12:23 pm and the current time in Williams is 11:23 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Williams, AZ? 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 43.12 gallons of gas to cover the route between Custer, SD and Williams, AZ.

The estimated cost of gas to go from Custer to Williams is $140.65.

During the route, an average car will release 844.77 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 Williams, AZ

If you want to meet halfway between Custer, SD and Williams, AZ or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.532448 and -107.651268, or 39º 31' 56.8128" N, 107º 39' 4.5648" W. This location is 536.82 miles away from Custer, SD and Williams, AZ and it would take approximately 10 hours 2 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Silt, CO, situated 537 miles from Custer, SD and 537 miles from Williams, AZ. It would take 8 hours 27 mins to go from Custer to Silt and 8 hours 54 mins to go from Williams to Silt.