| Cannock to Orbetello | 936.53 mi (1,507.21 km) |
| Cannock to Oria | 1,249.76 mi (2,011.29 km) |
| Cannock to Oristano | 1,016.03 mi (1,635.15 km) |
| Cannock to Orta Nova | 1,140.73 mi (1,835.83 km) |
| Cannock to Orte | 971.70 mi (1,563.79 km) |
| Cannock to Ortona | 1,043.32 mi (1,679.06 km) |
| Cannock to Orvieto | 949.01 mi (1,527.29 km) |
| Cannock to Orzinuovi | 737.96 mi (1,187.63 km) |
| Cannock to Osimo | 954.07 mi (1,535.43 km) |
| Cannock to Ospitaletto | 734.76 mi (1,182.48 km) |
| Cannock to Ostuni | 1,235.91 mi (1,989.01 km) |
| Cannock to Ottaviano | 1,125.87 mi (1,811.91 km) |
| Cannock to Ovada | 737.86 mi (1,187.47 km) |
| Cannock to Ozieri | 984.16 mi (1,583.85 km) |
| Cannock to Paceco | 1,233.40 mi (1,984.97 km) |
