| Rancho Santa Margarita to Ukiah (California) | 492.32 mi (792.31 km) |
| Rancho Santa Margarita to Union (Missouri) | 1,517.53 mi (2,442.23 km) |
| Rancho Santa Margarita to Union City (California) | 369.91 mi (595.32 km) |
| Rancho Santa Margarita to Union City (Georgia) | 1,892.66 mi (3,045.94 km) |
| Rancho Santa Margarita to Union City (New Jersey) | 2,422.26 mi (3,898.24 km) |
| Rancho Santa Margarita to Union City (Tennessee) | 1,620.92 mi (2,608.62 km) |
| Rancho Santa Margarita to Union Hill-Novelty Hill (Washington) | 997.50 mi (1,605.32 km) |
| Rancho Santa Margarita to Union Park (Florida) | 2,168.41 mi (3,489.72 km) |
| Rancho Santa Margarita to Uniondale (New York) | 2,445.30 mi (3,935.33 km) |
| Rancho Santa Margarita to Universal City (Texas) | 1,167.90 mi (1,879.55 km) |
| Rancho Santa Margarita to University (Florida) | 2,110.46 mi (3,396.45 km) |
| Rancho Santa Margarita to University City (Missouri) | 1,554.37 mi (2,501.51 km) |
| Rancho Santa Margarita to University Heights (Ohio) | 2,032.38 mi (3,270.81 km) |
| Rancho Santa Margarita to University of California-Santa Barbara (California) | 140.17 mi (225.58 km) |
| Rancho Santa Margarita to University Park (Texas) | 1,201.47 mi (1,933.57 km) |
