| Pornic to Oria | 1,081.09 mi (1,739.85 km) |
| Pornic to Oristano | 730.45 mi (1,175.55 km) |
| Pornic to Orta Nova | 965.52 mi (1,553.85 km) |
| Pornic to Orte | 778.37 mi (1,252.66 km) |
| Pornic to Ortona | 872.26 mi (1,403.77 km) |
| Pornic to Orvieto | 757.46 mi (1,219.02 km) |
| Pornic to Orzinuovi | 586.47 mi (943.84 km) |
| Pornic to Osimo | 796.39 mi (1,281.67 km) |
| Pornic to Ospitaletto | 590.16 mi (949.77 km) |
| Pornic to Ostuni | 1,070.49 mi (1,722.79 km) |
| Pornic to Ottaviano | 928.48 mi (1,494.24 km) |
| Pornic to Ovada | 544.13 mi (875.69 km) |
| Pornic to Ozieri | 712.85 mi (1,147.22 km) |
| Pornic to Paceco | 974.11 mi (1,567.68 km) |
| Pornic to Pachino | 1,135.15 mi (1,826.85 km) |
