| Felixstowe to Orbetello | 803.02 mi (1,292.34 km) |
| Felixstowe to Oria | 1,105.53 mi (1,779.17 km) |
| Felixstowe to Oristano | 901.77 mi (1,451.26 km) |
| Felixstowe to Orta Nova | 998.28 mi (1,606.57 km) |
| Felixstowe to Orte | 834.37 mi (1,342.79 km) |
| Felixstowe to Ortona | 901.24 mi (1,450.41 km) |
| Felixstowe to Orvieto | 811.73 mi (1,306.36 km) |
| Felixstowe to Orzinuovi | 598.30 mi (962.87 km) |
| Felixstowe to Osimo | 811.15 mi (1,305.42 km) |
| Felixstowe to Ospitaletto | 594.05 mi (956.04 km) |
| Felixstowe to Ostuni | 1,091.35 mi (1,756.36 km) |
| Felixstowe to Ottaviano | 987.18 mi (1,588.72 km) |
| Felixstowe to Ovada | 606.40 mi (975.91 km) |
| Felixstowe to Ozieri | 865.84 mi (1,393.44 km) |
| Felixstowe to Paceco | 1,107.37 mi (1,782.14 km) |
