| Gastonia to Opwijk | 4,191.91 mi (6,746.23 km) |
| Gastonia to Ostend | 4,134.27 mi (6,653.47 km) |
| Gastonia to Oud-Heverlee | 4,214.88 mi (6,783.20 km) |
| Gastonia to Oud-Turnhout | 4,215.52 mi (6,784.23 km) |
| Gastonia to Oudenaarde | 4,171.02 mi (6,712.62 km) |
| Gastonia to Oudenburg | 4,138.56 mi (6,660.36 km) |
| Gastonia to Oupeye | 4,257.71 mi (6,852.13 km) |
| Gastonia to Overijse | 4,210.71 mi (6,776.49 km) |
| Gastonia to Overpelt | 4,235.49 mi (6,816.36 km) |
| Gastonia to Paal | 4,230.18 mi (6,807.81 km) |
| Gastonia to Peer | 4,239.12 mi (6,822.20 km) |
| Gastonia to Pepinster | 4,268.45 mi (6,869.40 km) |
| Gastonia to Peruwelz | 4,178.50 mi (6,724.65 km) |
| Gastonia to Perwez | 4,226.21 mi (6,801.43 km) |
| Gastonia to Philippeville | 4,226.14 mi (6,801.32 km) |
