Distance between Casper WY and Rapid City SD

The distance from Casper to Rapid City is 254 miles by road including 60 miles on motorways. Road takes approximately 4 hours and 33 minutes and goes through Douglas, Lusk, Hot Springs, Edgemont and Hermosa.

Shortest distance by air 176 mi ✈️
Car route length 253.5 mi 🚗
Driving time 4 h 33 min
Fuel amount 8.6 gal
Fuel cost 32.9 USD
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City
Town
Village
Hamlet
Motorway
Primary
Secondary
Unclassified
Point Distance Time Fuel
Casper 0 mi 0:00 00 min 0.0 gal
I 25 51 mi, 52 min
Douglas 51 mi 0:52 52 min 1.6 gal
I 25 US 20 13 mi, 13 min
Orin Junction 64 mi 1:06 1 h 06 min 2.1 gal
US 18 8 mi, 08 min
Lost Springs 72 mi 1:14 1 h 14 min 2.2 gal
US 18 19 mi, 20 min
Keeline 91 mi 1:35 1 h 35 min 2.8 gal
US 18 11 mi, 12 min
Lusk 103 mi 1:47 1 h 47 min 3.4 gal
US 18 65 mi, 1 h 10 min
Edgemont 167 mi 2:58 2 h 58 min 5.5 gal
US 18 29 mi, 31 min
Hot Springs 196 mi 3:29 3 h 29 min 6.6 gal
US 18 Truck SD 79 42 mi, 45 min
Hermosa 239 mi 4:15 4 h 15 min 8.0 gal
SD 79 14 mi, 17 min
Rapid City 254 mi 4:33 4 h 33 min 8.5 gal
City
Town
Village
Hamlet
Motorway
Primary
Secondary
Unclassified
Point Distance Time Fuel
Casper 0 mi 0:00 00 min 0.0 gal
I 25 51 mi, 52 min
Douglas 51 mi 0:52 52 min 1.6 gal
I 25 US 20 13 mi, 13 min
Orin Junction 64 mi 1:06 1 h 06 min 2.1 gal
US 18 8 mi, 08 min
Lost Springs 72 mi 1:14 1 h 14 min 2.2 gal
US 18 19 mi, 20 min
Keeline 91 mi 1:35 1 h 35 min 2.8 gal
US 18 11 mi, 12 min
Lusk 103 mi 1:47 1 h 47 min 3.4 gal
US 18 65 mi, 1 h 10 min
Edgemont 167 mi 2:58 2 h 58 min 5.5 gal
US 18 7 mi, 07 min
Dudley 175 mi 3:05 3 h 05 min 5.9 gal
US 18 11 mi, 11 min
Minnekahta 185 mi 3:16 3 h 16 min 6.0 gal
US 18 12 mi, 13 min
Hot Springs 196 mi 3:29 3 h 29 min 6.6 gal
US 18 Truck SD 79 42 mi, 45 min
Hermosa 239 mi 4:15 4 h 15 min 8.0 gal
SD 79 14 mi, 17 min
Rapid City 254 mi 4:33 4 h 33 min 8.5 gal

Frequently Asked Questions

How much does it cost to drive from Casper to Rapid City?

Fuel cost: 32.9 USD

This fuel cost is calculated as: (Route length 253.5 mi) / (Fuel consumption 29.4 mpg) * (Fuel price 3.82 USD / gal)

You can adjust fuel consumption and fuel price here.

How long is a car ride from Casper to Rapid City?

Driving time: 4 h 33 min

This time is calculated for driving at the maximum permitted speed, taking into account traffic rules restrictions.

  • 7 mi with a maximum speed 68 mph = 6 min
  • 39 mi with a maximum speed 62 mph = 37 min
  • 178 mi with a maximum speed 56 mph = 3 h 10 min
  • 6 mi with a maximum speed 55 mph = 6 min
  • 16 mi with a maximum speed 50 mph = 19 min
  • 2 mi with a maximum speed 45 mph = 2 min
  • 1 mi with a maximum speed 35 mph = 1 min
  • 1 mi with a maximum speed 31 mph = 1 min
  • 2 mi with a maximum speed 30 mph = 5 min

The calculated driving time does not take into account intermediate stops and traffic jams.

How far is Casper to Rapid City by land?

The distance between Casper and Rapid City is 253.5 mi by road including 59.7 mi on motorways.

Precise satellite coordinates of highways were used for this calculation. The start and finish points are the centers of Casper and Rapid City respectively.

How far is Casper to Rapid City by plane?

The shortest distance (air line, as the crow flies) between Casper and Rapid City is 175.8 mi.

This distance is calculated using the Haversine formula as a great-circle distance between two points on the surface of a sphere. The start and finish points are the centers of Casper and Rapid City respectively. Actual distance between airports may be different.

How many hours is Casper from Rapid City by plane?

Boeing 737 airliner needs 21 min to cover the distance of 176 mi at a cruising speed of 497 mph.

Small plane "Cessna 172" needs 1 h 17 min to flight this distance at average speed of 136 mph.

This time is approximate and do not take into account takeoff and landing times, airport location and other real world factors.

How long is a helicopter ride from Casper to Rapid City?

Fast helicopter "Eurocopter AS350" or "Hughes OH-6 Cayuse" need 1 h 10 min to cover the distance of 176 mi at a cruising speed of 149 mph.

Popular "Robinson R44" needs 1 h 20 min to flight this distance at average speed of 130 mph.

This time is approximate and do not take into account takeoff and landing times, aerodrome location and other real world factors.

What city is halfway between Casper and Rapid City?

The halfway point between Casper and Rapid City is Lusk. It is located about 24 mi from the exact midpoint by road.

The distance from Lusk to Casper is 103 mi and driving will take about 1 h 47 min. The road between Lusk and Rapid City has length 151 mi and will take approximately 2 h 45 min.

The other cities located close to halfway point:

  • Keeline is in 91 mi from Casper and 163 mi from Rapid City
  • Edgemont is in 167 mi from Casper and 86 mi from Rapid City

Where is Casper in relation to Rapid City?

Casper is located 176 mi south-west of Rapid City.

Casper has geographic coordinates: latitude 42.86663, longitude -106.31308.

Rapid City has geographic coordinates: latitude 44.08118, longitude -103.22801.

Which highway goes from Casper to Rapid City?

The route from Casper to Rapid City follows US 18, US 20.

Other minor sections pass along the road:

  • I 25: 59 mi
  • SD 79: 47 mi
  • US 85: 47 mi
  • US 26: 34 mi
  • US 87: 34 mi
  • US 385: 4 mi
  • US 18 Truck: 2 mi
  • I 25 Business: 1 mi
  • SD 79P: 1 mi
  • I 90 Business: 1 mi
The distance between Casper and Rapid City is ranked 24,172nd in the ranking popularity.
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