| Potomac to Rancho Cordova (California) | 2,349.08 mi (3,780.47 km) |
| Potomac to Rancho Cucamonga (California) | 2,247.08 mi (3,616.32 km) |
| Potomac to Rancho Mirage (California) | 2,194.88 mi (3,532.32 km) |
| Potomac to Rancho Palos Verdes (California) | 2,298.84 mi (3,699.63 km) |
| Potomac to Rancho San Diego (California) | 2,246.97 mi (3,616.15 km) |
| Potomac to Rancho Santa Margarita (California) | 2,260.97 mi (3,638.69 km) |
| Potomac to Randallstown (Maryland) | 32.45 mi (52.22 km) |
| Potomac to Rantoul (Illinois) | 589.39 mi (948.53 km) |
| Potomac to Rapid City (South Dakota) | 1,384.12 mi (2,227.53 km) |
| Potomac to Ravenna (Ohio) | 260.32 mi (418.95 km) |
| Potomac to Raymondville (Texas) | 1,470.99 mi (2,367.33 km) |
| Potomac to Raymore (Missouri) | 926.92 mi (1,491.73 km) |
| Potomac to Raytown (Missouri) | 925.86 mi (1,490.03 km) |
| Potomac to Reading (Ohio) | 388.21 mi (624.77 km) |
| Potomac to Reading (Pennsylvania) | 113.74 mi (183.04 km) |
