| Ploermel to Oria | 1,112.39 mi (1,790.21 km) |
| Ploermel to Oristano | 777.39 mi (1,251.09 km) |
| Ploermel to Orta Nova | 997.06 mi (1,604.61 km) |
| Ploermel to Orte | 811.16 mi (1,305.43 km) |
| Ploermel to Ortona | 902.42 mi (1,452.30 km) |
| Ploermel to Orvieto | 789.75 mi (1,270.98 km) |
| Ploermel to Orzinuovi | 609.50 mi (980.90 km) |
| Ploermel to Osimo | 823.67 mi (1,325.57 km) |
| Ploermel to Ospitaletto | 612.09 mi (985.06 km) |
| Ploermel to Ostuni | 1,101.23 mi (1,772.26 km) |
| Ploermel to Ottaviano | 963.17 mi (1,550.07 km) |
| Ploermel to Ovada | 573.62 mi (923.16 km) |
| Ploermel to Ozieri | 757.47 mi (1,219.03 km) |
| Ploermel to Paceco | 1,018.38 mi (1,638.92 km) |
| Ploermel to Pachino | 1,177.99 mi (1,895.78 km) |
