| Basildon to Orbetello | 807.00 mi (1,298.74 km) |
| Basildon to Oria | 1,118.29 mi (1,799.72 km) |
| Basildon to Oristano | 894.93 mi (1,440.24 km) |
| Basildon to Orta Nova | 1,009.33 mi (1,624.36 km) |
| Basildon to Orte | 841.11 mi (1,353.64 km) |
| Basildon to Ortona | 911.93 mi (1,467.62 km) |
| Basildon to Orvieto | 818.43 mi (1,317.14 km) |
| Basildon to Orzinuovi | 606.80 mi (976.55 km) |
| Basildon to Osimo | 822.62 mi (1,323.89 km) |
| Basildon to Ospitaletto | 603.45 mi (971.16 km) |
| Basildon to Ostuni | 1,104.45 mi (1,777.45 km) |
| Basildon to Ottaviano | 995.03 mi (1,601.35 km) |
| Basildon to Ovada | 608.79 mi (979.75 km) |
| Basildon to Ozieri | 860.96 mi (1,385.59 km) |
| Basildon to Paceco | 1,106.89 mi (1,781.37 km) |
