| Grottaferrata to Novi di Modena | 232.25 mi (373.76 km) |
| Grottaferrata to Novi Ligure | 283.40 mi (456.09 km) |
| Grottaferrata to Nuoro | 201.46 mi (324.22 km) |
| Grottaferrata to Occhiobello | 223.31 mi (359.38 km) |
| Grottaferrata to Oderzo | 276.00 mi (444.18 km) |
| Grottaferrata to Oggiono | 321.87 mi (518.00 km) |
| Grottaferrata to Olbia | 175.16 mi (281.90 km) |
| Grottaferrata to Oleggio | 331.66 mi (533.75 km) |
| Grottaferrata to Olgiate Comasco | 332.10 mi (534.46 km) |
| Grottaferrata to Olgiate Olona | 326.07 mi (524.75 km) |
| Grottaferrata to Omegna | 353.48 mi (568.88 km) |
| Grottaferrata to Opera | 302.58 mi (486.96 km) |
| Grottaferrata to Oppeano | 253.81 mi (408.47 km) |
| Grottaferrata to Orbassano | 340.34 mi (547.73 km) |
| Grottaferrata to Orbetello | 87.28 mi (140.46 km) |
