| Rancho Santa Margarita to Red Bank (New Jersey) | 2,421.86 mi (3,897.61 km) |
| Rancho Santa Margarita to Red Bank (Tennessee) | 1,836.97 mi (2,956.32 km) |
| Rancho Santa Margarita to Red Bluff (California) | 519.50 mi (836.06 km) |
| Rancho Santa Margarita to Red Hill (South Carolina) | 2,204.72 mi (3,548.15 km) |
| Rancho Santa Margarita to Red Oak (Texas) | 1,205.36 mi (1,939.84 km) |
| Rancho Santa Margarita to Red Wing (Minnesota) | 1,529.87 mi (2,462.08 km) |
| Rancho Santa Margarita to Redan (Georgia) | 1,913.65 mi (3,079.72 km) |
| Rancho Santa Margarita to Redding (California) | 546.39 mi (879.32 km) |
| Rancho Santa Margarita to Redland (Maryland) | 2,263.07 mi (3,642.06 km) |
| Rancho Santa Margarita to Redlands (California) | 37.97 mi (61.11 km) |
| Rancho Santa Margarita to Redmond (Oregon) | 759.02 mi (1,221.52 km) |
| Rancho Santa Margarita to Redmond (Washington) | 998.40 mi (1,606.78 km) |
| Rancho Santa Margarita to Redondo Beach (California) | 47.33 mi (76.17 km) |
| Rancho Santa Margarita to Redwood City (California) | 372.90 mi (600.13 km) |
| Rancho Santa Margarita to Reedley (California) | 230.07 mi (370.26 km) |
