Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Denver International Airport Book Hotels

Distance from Custer, SD to DEN Airport

Distance

372 mi

Time

6 hours 43 mins

Gas Cost

$34 - $66

Helpful Inaccurate

There are 275.80 miles from Custer to Denver International Airport (DEN) in south direction and 372 miles (598.68 kilometers) by car, following the I-25 route.

Custer and DEN Airport are 6 hours 43 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to DEN Airport. The halfway point is Glendo, WY.

Custer, SD and DEN Airport are in the same time zone (MDT). Current time in both locations is 10:27 pm.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to DEN Airport? 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 14.94 gallons of gas to cover the route between Custer, SD and DEN Airport.

The estimated cost of gas to go from Custer to DEN Airport is $47.88.

During the route, an average car will release 292.76 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 DEN Airport

If you want to meet halfway between Custer, SD and DEN Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 42.315960 and -105.047523, or 42º 18' 57.456" N, 105º 2' 51.0828" W. This location is 186.04 miles away from Custer, SD and DEN Airport and it would take approximately 3 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 Glendo, WY, situated 165 miles from Custer, SD and 209 miles from DEN Airport. It would take 2 hours 55 mins to go from Custer to Glendo and 2 hours 57 mins to go from DEN to Glendo.