| Rancho San Diego to Red Bank (New Jersey) | 2,411.02 mi (3,880.17 km) |
| Rancho San Diego to Red Bank (Tennessee) | 1,812.43 mi (2,916.83 km) |
| Rancho San Diego to Red Bluff (California) | 591.01 mi (951.14 km) |
| Rancho San Diego to Red Hill (South Carolina) | 2,178.61 mi (3,506.13 km) |
| Rancho San Diego to Red Oak (Texas) | 1,169.71 mi (1,882.46 km) |
| Rancho San Diego to Red Wing (Minnesota) | 1,536.03 mi (2,472.00 km) |
| Rancho San Diego to Redan (Georgia) | 1,885.88 mi (3,035.02 km) |
| Rancho San Diego to Redding (California) | 617.79 mi (994.24 km) |
| Rancho San Diego to Redland (Maryland) | 2,249.34 mi (3,619.97 km) |
| Rancho San Diego to Redlands (California) | 90.22 mi (145.20 km) |
| Rancho San Diego to Redmond (Oregon) | 826.90 mi (1,330.77 km) |
| Rancho San Diego to Redmond (Washington) | 1,065.67 mi (1,715.03 km) |
| Rancho San Diego to Redondo Beach (California) | 113.15 mi (182.09 km) |
| Rancho San Diego to Redwood City (California) | 443.84 mi (714.29 km) |
| Rancho San Diego to Reedley (California) | 301.44 mi (485.11 km) |
