| Plougastel-Daoulas to Oria | 1,208.29 mi (1,944.55 km) |
| Plougastel-Daoulas to Oristano | 866.94 mi (1,395.20 km) |
| Plougastel-Daoulas to Orta Nova | 1,092.95 mi (1,758.93 km) |
| Plougastel-Daoulas to Orte | 906.95 mi (1,459.59 km) |
| Plougastel-Daoulas to Ortona | 998.33 mi (1,606.66 km) |
| Plougastel-Daoulas to Orvieto | 885.58 mi (1,425.21 km) |
| Plougastel-Daoulas to Orzinuovi | 704.77 mi (1,134.22 km) |
| Plougastel-Daoulas to Osimo | 919.45 mi (1,479.71 km) |
| Plougastel-Daoulas to Ospitaletto | 707.13 mi (1,138.01 km) |
| Plougastel-Daoulas to Ostuni | 1,197.14 mi (1,926.62 km) |
| Plougastel-Daoulas to Ottaviano | 1,058.74 mi (1,703.88 km) |
| Plougastel-Daoulas to Ovada | 669.54 mi (1,077.52 km) |
| Plougastel-Daoulas to Ozieri | 848.91 mi (1,366.18 km) |
| Plougastel-Daoulas to Paceco | 1,110.12 mi (1,786.56 km) |
| Plougastel-Daoulas to Pachino | 1,270.68 mi (2,044.95 km) |
