| Ferentino to Novi di Modena | 251.27 mi (404.38 km) |
| Ferentino to Novi Ligure | 309.25 mi (497.69 km) |
| Ferentino to Nuoro | 224.98 mi (362.07 km) |
| Ferentino to Occhiobello | 238.95 mi (384.55 km) |
| Ferentino to Oderzo | 285.62 mi (459.66 km) |
| Ferentino to Oggiono | 343.64 mi (553.04 km) |
| Ferentino to Olbia | 201.71 mi (324.62 km) |
| Ferentino to Oleggio | 355.57 mi (572.23 km) |
| Ferentino to Olgiate Comasco | 354.82 mi (571.02 km) |
| Ferentino to Olgiate Olona | 349.35 mi (562.23 km) |
| Ferentino to Omegna | 377.17 mi (607.00 km) |
| Ferentino to Opera | 325.75 mi (524.24 km) |
| Ferentino to Oppeano | 270.49 mi (435.31 km) |
| Ferentino to Orbassano | 367.47 mi (591.39 km) |
| Ferentino to Orbetello | 116.84 mi (188.04 km) |
