| Mount Holly to Opwijk | 4,181.60 mi (6,729.63 km) |
| Mount Holly to Ostend | 4,123.96 mi (6,636.87 km) |
| Mount Holly to Oud-Heverlee | 4,204.57 mi (6,766.60 km) |
| Mount Holly to Oud-Turnhout | 4,205.25 mi (6,767.69 km) |
| Mount Holly to Oudenaarde | 4,160.69 mi (6,695.99 km) |
| Mount Holly to Oudenburg | 4,128.24 mi (6,643.76 km) |
| Mount Holly to Oupeye | 4,247.41 mi (6,835.54 km) |
| Mount Holly to Overijse | 4,200.39 mi (6,759.88 km) |
| Mount Holly to Overpelt | 4,225.21 mi (6,799.83 km) |
| Mount Holly to Paal | 4,219.89 mi (6,791.25 km) |
| Mount Holly to Peer | 4,228.84 mi (6,805.66 km) |
| Mount Holly to Pepinster | 4,258.14 mi (6,852.81 km) |
| Mount Holly to Peruwelz | 4,168.15 mi (6,707.98 km) |
| Mount Holly to Perwez | 4,215.88 mi (6,784.81 km) |
| Mount Holly to Philippeville | 4,215.78 mi (6,784.65 km) |
