| Comacchio to Oerlinghausen | 527.26 mi (848.54 km) |
| Comacchio to Oestrich-Winkel | 415.11 mi (668.05 km) |
| Comacchio to Offenburg | 329.23 mi (529.84 km) |
| Comacchio to Oftersheim | 364.39 mi (586.43 km) |
| Comacchio to Ohrdruf | 428.71 mi (689.95 km) |
| Comacchio to Ohringen | 335.63 mi (540.15 km) |
| Comacchio to Olbernhau | 415.70 mi (669.01 km) |
| Comacchio to Olching | 245.32 mi (394.80 km) |
| Comacchio to Oldenburg | 610.37 mi (982.30 km) |
| Comacchio to Oldenburg in Holstein | 665.83 mi (1,071.54 km) |
| Comacchio to Olfen | 532.52 mi (857.01 km) |
| Comacchio to Olpe | 480.57 mi (773.40 km) |
| Comacchio to Olsberg | 490.09 mi (788.72 km) |
| Comacchio to Oranienburg | 558.56 mi (898.91 km) |
| Comacchio to Ortenberg | 417.04 mi (671.16 km) |
