| Potomac to Nowy Dwor Mazowiecki | 4,442.17 mi (7,148.99 km) |
| Potomac to Nowy Sacz | 4,544.01 mi (7,312.87 km) |
| Potomac to Nowy Targ | 4,524.01 mi (7,280.68 km) |
| Potomac to Nowy Tomysl | 4,278.60 mi (6,885.75 km) |
| Potomac to Nysa | 4,386.07 mi (7,058.70 km) |
| Potomac to Oborniki | 4,292.82 mi (6,908.63 km) |
| Potomac to Oborniki Slaskie | 4,341.37 mi (6,986.76 km) |
| Potomac to Olawa | 4,368.86 mi (7,031.00 km) |
| Potomac to Olecko | 4,447.10 mi (7,156.92 km) |
| Potomac to Olesnica | 4,362.84 mi (7,021.32 km) |
| Potomac to Olesno | 4,412.95 mi (7,101.95 km) |
| Potomac to Olkusz | 4,477.26 mi (7,205.45 km) |
| Potomac to Olsztyn | 4,385.92 mi (7,058.45 km) |
| Potomac to Opalenica | 4,289.30 mi (6,902.96 km) |
| Potomac to Opoczno | 4,464.57 mi (7,185.04 km) |
