| Alcanena to Oerlinghausen | 1,196.18 mi (1,925.06 km) |
| Alcanena to Oestrich-Winkel | 1,090.45 mi (1,754.91 km) |
| Alcanena to Offenburg | 1,029.82 mi (1,657.33 km) |
| Alcanena to Oftersheim | 1,087.82 mi (1,750.67 km) |
| Alcanena to Ohrdruf | 1,222.20 mi (1,966.94 km) |
| Alcanena to Ohringen | 1,116.94 mi (1,797.53 km) |
| Alcanena to Olbernhau | 1,315.12 mi (2,116.48 km) |
| Alcanena to Olching | 1,159.32 mi (1,865.75 km) |
| Alcanena to Oldenburg | 1,235.52 mi (1,988.38 km) |
| Alcanena to Oldenburg in Holstein | 1,370.11 mi (2,204.98 km) |
| Alcanena to Olfen | 1,143.27 mi (1,839.91 km) |
| Alcanena to Olpe | 1,126.99 mi (1,813.71 km) |
| Alcanena to Olsberg | 1,163.35 mi (1,872.24 km) |
| Alcanena to Oranienburg | 1,384.10 mi (2,227.49 km) |
| Alcanena to Ortenberg | 1,142.81 mi (1,839.18 km) |
