| Cassino to Oerlinghausen | 762.95 mi (1,227.85 km) |
| Cassino to Oestrich-Winkel | 650.67 mi (1,047.15 km) |
| Cassino to Offenburg | 560.71 mi (902.37 km) |
| Cassino to Oftersheim | 600.03 mi (965.66 km) |
| Cassino to Ohrdruf | 661.21 mi (1,064.11 km) |
| Cassino to Ohringen | 571.87 mi (920.33 km) |
| Cassino to Olbernhau | 633.81 mi (1,020.01 km) |
| Cassino to Olching | 478.98 mi (770.85 km) |
| Cassino to Oldenburg | 845.82 mi (1,361.21 km) |
| Cassino to Oldenburg in Holstein | 894.68 mi (1,439.86 km) |
| Cassino to Olfen | 768.70 mi (1,237.10 km) |
| Cassino to Olpe | 716.71 mi (1,153.43 km) |
| Cassino to Olsberg | 726.21 mi (1,168.72 km) |
| Cassino to Oranienburg | 778.10 mi (1,252.23 km) |
| Cassino to Ortenberg | 653.19 mi (1,051.21 km) |
