| Sussex to Orbetello | 4,704.81 mi (7,571.65 km) |
| Sussex to Oria | 5,043.58 mi (8,116.87 km) |
| Sussex to Oristano | 4,708.60 mi (7,577.77 km) |
| Sussex to Orta Nova | 4,930.69 mi (7,935.18 km) |
| Sussex to Orte | 4,750.12 mi (7,644.59 km) |
| Sussex to Ortona | 4,833.52 mi (7,778.81 km) |
| Sussex to Orvieto | 4,727.95 mi (7,608.91 km) |
| Sussex to Orzinuovi | 4,528.06 mi (7,287.21 km) |
| Sussex to Osimo | 4,747.49 mi (7,640.35 km) |
| Sussex to Ospitaletto | 4,526.91 mi (7,285.36 km) |
| Sussex to Ostuni | 5,030.72 mi (8,096.16 km) |
| Sussex to Ottaviano | 4,904.45 mi (7,892.95 km) |
| Sussex to Ovada | 4,509.89 mi (7,257.97 km) |
| Sussex to Ozieri | 4,696.24 mi (7,557.88 km) |
| Sussex to Paceco | 4,957.00 mi (7,977.51 km) |
