Distance between Rapid City SD and Casper WY

The distance from Rapid City to Casper is 254 miles by road including 60 miles on motorways. Road takes approximately 4 hours and 31 minutes and goes through Hot Springs, Lusk, Douglas, Hermosa and Edgemont.

Shortest distance by air 176 mi ✈️
Car route length 253.5 mi 🚗
Driving time 4 h 31 min
Fuel amount 7.2 gal
Fuel cost 32.9 USD
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City
Town
Village
Hamlet
Motorway
Primary
Secondary
Unclassified
Point Distance Time Fuel
Rapid City 0 mi 0:00 00 min 0.0 gal
I 90 Business SD 79 15 mi, 18 min
Hermosa 15 mi 0:18 18 min 0.3 gal
SD 79 42 mi, 45 min
Hot Springs 57 mi 1:03 1 h 03 min 1.6 gal
US 18 Truck US 18 12 mi, 13 min
Minnekahta 69 mi 1:16 1 h 16 min 1.7 gal
US 18 11 mi, 11 min
Dudley 80 mi 1:27 1 h 27 min 2.2 gal
US 18 7 mi, 07 min
Edgemont 86 mi 1:35 1 h 35 min 2.3 gal
US 18 65 mi, 1 h 10 min
Lusk 152 mi 2:45 2 h 45 min 4.2 gal
US 18 11 mi, 12 min
Keeline 163 mi 2:58 2 h 58 min 4.4 gal
US 18 US 20 40 mi, 42 min
Douglas 203 mi 3:40 3 h 40 min 5.7 gal
I 25 50 mi, 50 min
Casper 254 mi 4:30 4 h 30 min 7.1 gal
City
Town
Village
Hamlet
Motorway
Primary
Secondary
Unclassified
Point Distance Time Fuel
Rapid City 0 mi 0:00 00 min 0.0 gal
I 90 Business SD 79 15 mi, 18 min
Hermosa 15 mi 0:18 18 min 0.3 gal
SD 79 42 mi, 45 min
Hot Springs 57 mi 1:03 1 h 03 min 1.6 gal
US 18 Truck US 18 12 mi, 13 min
Minnekahta 69 mi 1:16 1 h 16 min 1.7 gal
US 18 11 mi, 11 min
Dudley 80 mi 1:27 1 h 27 min 2.2 gal
US 18 7 mi, 07 min
Edgemont 86 mi 1:35 1 h 35 min 2.3 gal
US 18 65 mi, 1 h 10 min
Lusk 152 mi 2:45 2 h 45 min 4.2 gal
US 18 11 mi, 12 min
Keeline 163 mi 2:58 2 h 58 min 4.4 gal
US 18 19 mi, 20 min
Lost Springs 181 mi 3:18 3 h 18 min 4.9 gal
US 18 8 mi, 08 min
Orin Junction 190 mi 3:27 3 h 27 min 5.3 gal
US 18 US 20 13 mi, 13 min
Douglas 203 mi 3:40 3 h 40 min 5.7 gal
I 25 50 mi, 50 min
Casper 254 mi 4:30 4 h 30 min 7.1 gal

Frequently Asked Questions

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

Fuel cost: 32.9 USD

This fuel cost is calculated as: (Route length 253.5 mi) / (Fuel consumption 35.31 mpg) * (Fuel price 4.59 USD / gal)

You can adjust fuel consumption and fuel price here.

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

Driving time: 4 h 31 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
  • 47 mi with a maximum speed 62 mph = 45 min
  • 178 mi with a maximum speed 56 mph = 3 h 10 min
  • 6 mi with a maximum speed 55 mph = 6 min
  • 7 mi with a maximum speed 50 mph = 8 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 Rapid City to Casper by land?

The distance between Rapid City and Casper is 253.5 mi by road including 60.3 mi on motorways.

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

How far is Rapid City to Casper by plane?

The shortest distance (air line, as the crow flies) between Rapid City and Casper 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 Rapid City and Casper respectively. Actual distance between airports may be different.

How many hours is Rapid City from Casper 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 Rapid City to Casper?

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 Rapid City and Casper?

The halfway point between Rapid City and Casper is Lusk. It is located about 25 mi from the exact midpoint by road.

The distance from Lusk to Rapid City is 152 mi and driving will take about 2 h 45 min. The road between Lusk and Casper has length 102 mi and will take approximately 1 h 45 min.

The other cities located close to halfway point:

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

Where is Rapid City in relation to Casper?

Rapid City is located 176 mi north-east of Casper.

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

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

Which highway goes from Rapid City to Casper?

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

Other minor sections pass along the road:

  • I 25: 60 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 90 Business: 1 mi
  • SD 79P: 1 mi
The distance between Rapid City and Casper is ranked 24,172nd in the ranking popularity.
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