| Dieppe to Oria | 1,031.83 mi (1,660.57 km) |
| Dieppe to Oristano | 782.54 mi (1,259.37 km) |
| Dieppe to Orta Nova | 920.20 mi (1,480.92 km) |
| Dieppe to Orte | 745.55 mi (1,199.84 km) |
| Dieppe to Ortona | 822.69 mi (1,323.99 km) |
| Dieppe to Orvieto | 722.93 mi (1,163.44 km) |
| Dieppe to Orzinuovi | 516.42 mi (831.09 km) |
| Dieppe to Osimo | 735.45 mi (1,183.60 km) |
| Dieppe to Ospitaletto | 514.77 mi (828.45 km) |
| Dieppe to Ostuni | 1,018.69 mi (1,639.42 km) |
| Dieppe to Ottaviano | 900.46 mi (1,449.14 km) |
| Dieppe to Ovada | 508.35 mi (818.11 km) |
| Dieppe to Ozieri | 750.39 mi (1,207.64 km) |
| Dieppe to Paceco | 1,000.36 mi (1,609.93 km) |
| Dieppe to Pachino | 1,148.77 mi (1,848.76 km) |
