| Merriam to Opwijk | 4,530.64 mi (7,291.36 km) |
| Merriam to Ostend | 4,474.66 mi (7,201.27 km) |
| Merriam to Oud-Heverlee | 4,553.34 mi (7,327.90 km) |
| Merriam to Oud-Turnhout | 4,546.75 mi (7,317.28 km) |
| Merriam to Oudenaarde | 4,513.49 mi (7,263.76 km) |
| Merriam to Oudenburg | 4,479.17 mi (7,208.53 km) |
| Merriam to Oupeye | 4,593.77 mi (7,392.96 km) |
| Merriam to Overijse | 4,550.32 mi (7,323.04 km) |
| Merriam to Overpelt | 4,566.22 mi (7,348.62 km) |
| Merriam to Paal | 4,564.07 mi (7,345.17 km) |
| Merriam to Peer | 4,570.73 mi (7,355.88 km) |
| Merriam to Pepinster | 4,605.52 mi (7,411.87 km) |
| Merriam to Peruwelz | 4,525.17 mi (7,282.55 km) |
| Merriam to Perwez | 4,566.65 mi (7,349.31 km) |
| Merriam to Philippeville | 4,572.85 mi (7,359.29 km) |
