| Hilsea to Orbetello | 819.95 mi (1,319.58 km) |
| Hilsea to Oria | 1,145.49 mi (1,843.48 km) |
| Hilsea to Oristano | 886.94 mi (1,427.40 km) |
| Hilsea to Orta Nova | 1,033.90 mi (1,663.89 km) |
| Hilsea to Orte | 858.87 mi (1,382.21 km) |
| Hilsea to Ortona | 936.39 mi (1,506.97 km) |
| Hilsea to Orvieto | 836.27 mi (1,345.85 km) |
| Hilsea to Orzinuovi | 630.11 mi (1,014.06 km) |
| Hilsea to Osimo | 849.10 mi (1,366.49 km) |
| Hilsea to Ospitaletto | 628.42 mi (1,011.34 km) |
| Hilsea to Ostuni | 1,132.31 mi (1,822.28 km) |
| Hilsea to Ottaviano | 1,013.83 mi (1,631.60 km) |
| Hilsea to Ovada | 621.00 mi (999.41 km) |
| Hilsea to Ozieri | 856.96 mi (1,379.14 km) |
| Hilsea to Paceco | 1,109.69 mi (1,785.88 km) |
