| Gundelfingen to Opwijk | 260.93 mi (419.93 km) |
| Gundelfingen to Ostend | 311.91 mi (501.97 km) |
| Gundelfingen to Oud-Heverlee | 240.45 mi (386.97 km) |
| Gundelfingen to Oud-Turnhout | 260.31 mi (418.92 km) |
| Gundelfingen to Oudenaarde | 272.58 mi (438.68 km) |
| Gundelfingen to Oudenburg | 307.35 mi (494.64 km) |
| Gundelfingen to Oupeye | 209.55 mi (337.25 km) |
| Gundelfingen to Overijse | 241.40 mi (388.50 km) |
| Gundelfingen to Overpelt | 245.14 mi (394.52 km) |
| Gundelfingen to Paal | 239.64 mi (385.67 km) |
| Gundelfingen to Peer | 239.27 mi (385.06 km) |
| Gundelfingen to Pepinster | 197.31 mi (317.54 km) |
| Gundelfingen to Peruwelz | 257.77 mi (414.84 km) |
| Gundelfingen to Perwez | 225.09 mi (362.25 km) |
| Gundelfingen to Philippeville | 211.39 mi (340.19 km) |
