| Rancho Santa Margarita to Commerce (California) | 40.53 mi (65.22 km) |
| Rancho Santa Margarita to Commerce City (Colorado) | 825.88 mi (1,329.13 km) |
| Rancho Santa Margarita to Compton (California) | 40.37 mi (64.96 km) |
| Rancho Santa Margarita to Comstock Park (Michigan) | 1,834.65 mi (2,952.59 km) |
| Rancho Santa Margarita to Concord (California) | 388.23 mi (624.80 km) |
| Rancho Santa Margarita to Concord (Missouri) | 1,552.17 mi (2,497.98 km) |
| Rancho Santa Margarita to Concord (New Hampshire) | 2,544.39 mi (4,094.79 km) |
| Rancho Santa Margarita to Concord (North Carolina) | 2,095.66 mi (3,372.63 km) |
| Rancho Santa Margarita to Conneaut (Ohio) | 2,084.04 mi (3,353.93 km) |
| Rancho Santa Margarita to Connersville (Indiana) | 1,836.23 mi (2,955.13 km) |
| Rancho Santa Margarita to Conroe (Texas) | 1,313.58 mi (2,114.00 km) |
| Rancho Santa Margarita to Converse (Texas) | 1,168.81 mi (1,881.02 km) |
| Rancho Santa Margarita to Conway (Arkansas) | 1,433.11 mi (2,306.36 km) |
| Rancho Santa Margarita to Conway (Florida) | 2,164.40 mi (3,483.27 km) |
| Rancho Santa Margarita to Conway (South Carolina) | 2,202.11 mi (3,543.95 km) |
