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

Distance from Custer, SD to Sergeant Bluff, IA

Distance

475 mi

Time

7 hours 54 mins

Gas Cost

$43 - $84

There are 377.17 miles from Custer to Sergeant Bluff in southeast direction and 475 miles (764.44 kilometers) by car, following the I-90 and US-14 route.

Custer and Sergeant Bluff are 7 hours 54 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Sergeant Bluff, IA. The halfway point is Reliance, SD.

Please note the time difference between Custer, SD and Sergeant Bluff, IA is 1 hour. The current time in Custer is 11:45 pm (Mar 11) and the current time in Sergeant Bluff is 12:45 am (Mar 12).

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Sergeant Bluff, IA? 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 19.06 gallons of gas to cover the route between Custer, SD and Sergeant Bluff, IA.

The estimated cost of gas to go from Custer to Sergeant Bluff is $61.07.

During the route, an average car will release 373.44 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Custer, SD and Sergeant Bluff, IA

If you want to meet halfway between Custer, SD and Sergeant Bluff, IA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.865795 and -99.611549, or 43º 51' 56.862" N, 99º 36' 41.5764" W. This location is 237.31 miles away from Custer, SD and Sergeant Bluff, IA and it would take approximately 3 hours 57 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Reliance, SD, situated 234 miles from Custer, SD and 244 miles from Sergeant Bluff, IA. It would take 3 hours 22 mins to go from Custer to Reliance and 3 hours 14 mins to go from Sergeant Bluff to Reliance.