| Donaueschingen to Opwijk | 284.50 mi (457.86 km) |
| Donaueschingen to Ostend | 337.00 mi (542.35 km) |
| Donaueschingen to Oud-Heverlee | 263.31 mi (423.75 km) |
| Donaueschingen to Oud-Turnhout | 280.68 mi (451.71 km) |
| Donaueschingen to Oudenaarde | 297.65 mi (479.03 km) |
| Donaueschingen to Oudenburg | 332.44 mi (535.01 km) |
| Donaueschingen to Oupeye | 229.80 mi (369.82 km) |
| Donaueschingen to Overijse | 264.77 mi (426.11 km) |
| Donaueschingen to Overpelt | 264.45 mi (425.59 km) |
| Donaueschingen to Paal | 260.33 mi (418.97 km) |
| Donaueschingen to Peer | 258.72 mi (416.36 km) |
| Donaueschingen to Pepinster | 217.42 mi (349.90 km) |
| Donaueschingen to Peruwelz | 283.87 mi (456.85 km) |
| Donaueschingen to Perwez | 248.31 mi (399.61 km) |
| Donaueschingen to Philippeville | 236.83 mi (381.14 km) |
