| Potomac to Plombieres | 3,931.53 mi (6,327.18 km) |
| Potomac to Pont-a-Celles | 3,872.91 mi (6,232.85 km) |
| Potomac to Poperinge | 3,797.76 mi (6,111.91 km) |
| Potomac to Profondeville | 3,897.31 mi (6,272.12 km) |
| Potomac to Putte | 3,870.14 mi (6,228.38 km) |
| Potomac to Puurs | 3,855.24 mi (6,204.40 km) |
| Potomac to Quaregnon | 3,854.93 mi (6,203.91 km) |
| Potomac to Raeren | 3,939.59 mi (6,340.16 km) |
| Potomac to Ranst | 3,862.92 mi (6,216.77 km) |
| Potomac to Ravels | 3,876.68 mi (6,238.91 km) |
| Potomac to Retie | 3,881.94 mi (6,247.37 km) |
| Potomac to Riemst | 3,915.48 mi (6,301.36 km) |
| Potomac to Rijkevorsel | 3,867.77 mi (6,224.57 km) |
| Potomac to Rixensart | 3,874.73 mi (6,235.77 km) |
| Potomac to Rochefort | 3,917.04 mi (6,303.86 km) |
