| Penkridge to Orbetello | 940.87 mi (1,514.19 km) |
| Penkridge to Oria | 1,254.18 mi (2,018.41 km) |
| Penkridge to Oristano | 1,020.08 mi (1,641.66 km) |
| Penkridge to Orta Nova | 1,145.15 mi (1,842.94 km) |
| Penkridge to Orte | 976.07 mi (1,570.84 km) |
| Penkridge to Ortona | 1,047.73 mi (1,686.16 km) |
| Penkridge to Orvieto | 953.39 mi (1,534.33 km) |
| Penkridge to Orzinuovi | 742.36 mi (1,194.71 km) |
| Penkridge to Osimo | 958.49 mi (1,542.54 km) |
| Penkridge to Ospitaletto | 739.17 mi (1,189.57 km) |
| Penkridge to Ostuni | 1,240.34 mi (1,996.13 km) |
| Penkridge to Ottaviano | 1,130.25 mi (1,818.97 km) |
| Penkridge to Ovada | 742.18 mi (1,194.43 km) |
| Penkridge to Ozieri | 988.28 mi (1,590.48 km) |
| Penkridge to Paceco | 1,237.63 mi (1,991.77 km) |
