Flight Time from Castle Rock to Longmont
The flight from Castle Rock to Longmont covers about 56 mi and takes roughly 36 min nonstop. Flight duration estimate and fare guide.
Castle Rock and Longmont are about 56 mi (91 km) apart in a straight line. By road that works out to roughly 73 mi (118 km), a drive of about 1 hr 41 min. A nonstop flight covers the great-circle distance in approximately 36 min.
| Straight-line distance | 56 mi / 91 km |
| Road distance (est.) | 73 mi / 118 km |
| Driving time (est.) | 1 hr 41 min |
| Nonstop flight (est.) | 36 min |
| Driving fuel (est., 1-way) | $9 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | 39.770, -104.978 |
How these estimates work
Straight-line distance uses the haversine formula on each city's coordinates. Road distance applies a circuity factor (~1.2–1.4×) and driving time a blended average speed. Flight time uses typical jet cruise speed plus ~30 minutes for taxi, climb and descent. Treat all figures as planning estimates.
Frequently asked questions
Castle Rock to Longmont is about 56 mi (91 km) in a straight line, and roughly 73 mi (118 km) by road.