| Otopeni to Noventa Vicentina | 712.07 mi (1,145.97 km) |
| Otopeni to Novi di Modena | 743.99 mi (1,197.33 km) |
| Otopeni to Novi Ligure | 848.05 mi (1,364.81 km) |
| Otopeni to Nuoro | 900.26 mi (1,448.83 km) |
| Otopeni to Occhiobello | 710.64 mi (1,143.67 km) |
| Otopeni to Oderzo | 666.03 mi (1,071.88 km) |
| Otopeni to Oggiono | 817.43 mi (1,315.53 km) |
| Otopeni to Olbia | 875.82 mi (1,409.50 km) |
| Otopeni to Oleggio | 852.17 mi (1,371.44 km) |
| Otopeni to Olgiate Comasco | 835.90 mi (1,345.25 km) |
| Otopeni to Olgiate Olona | 840.04 mi (1,351.92 km) |
| Otopeni to Omegna | 862.82 mi (1,388.57 km) |
| Otopeni to Opera | 824.36 mi (1,326.69 km) |
| Otopeni to Oppeano | 729.06 mi (1,173.31 km) |
| Otopeni to Orbassano | 907.52 mi (1,460.51 km) |
