| Alcamo to Oerlinghausen | 988.65 mi (1,591.08 km) |
| Alcamo to Oestrich-Winkel | 866.03 mi (1,393.74 km) |
| Alcamo to Offenburg | 767.26 mi (1,234.78 km) |
| Alcamo to Oftersheim | 816.65 mi (1,314.28 km) |
| Alcamo to Ohrdruf | 894.56 mi (1,439.66 km) |
| Alcamo to Ohringen | 794.29 mi (1,278.29 km) |
| Alcamo to Olbernhau | 876.91 mi (1,411.24 km) |
| Alcamo to Olching | 711.11 mi (1,144.42 km) |
| Alcamo to Oldenburg | 1,072.17 mi (1,725.49 km) |
| Alcamo to Oldenburg in Holstein | 1,132.02 mi (1,821.81 km) |
| Alcamo to Olfen | 987.11 mi (1,588.60 km) |
| Alcamo to Olpe | 935.12 mi (1,504.94 km) |
| Alcamo to Olsberg | 949.34 mi (1,527.82 km) |
| Alcamo to Oranienburg | 1,021.05 mi (1,643.22 km) |
| Alcamo to Ortenberg | 876.58 mi (1,410.72 km) |
