| Sanlucar de Barrameda to Orbetello | 1,011.31 mi (1,627.55 km) |
| Sanlucar de Barrameda to Oria | 1,315.59 mi (2,117.24 km) |
| Sanlucar de Barrameda to Oristano | 837.18 mi (1,347.30 km) |
| Sanlucar de Barrameda to Orta Nova | 1,221.34 mi (1,965.55 km) |
| Sanlucar de Barrameda to Orte | 1,069.19 mi (1,720.70 km) |
| Sanlucar de Barrameda to Ortona | 1,167.13 mi (1,878.31 km) |
| Sanlucar de Barrameda to Orvieto | 1,060.61 mi (1,706.89 km) |
| Sanlucar de Barrameda to Orzinuovi | 1,033.63 mi (1,663.47 km) |
| Sanlucar de Barrameda to Osimo | 1,142.27 mi (1,838.30 km) |
| Sanlucar de Barrameda to Ospitaletto | 1,044.83 mi (1,681.50 km) |
| Sanlucar de Barrameda to Ostuni | 1,314.07 mi (2,114.79 km) |
| Sanlucar de Barrameda to Ottaviano | 1,153.27 mi (1,856.00 km) |
| Sanlucar de Barrameda to Ovada | 953.02 mi (1,533.75 km) |
| Sanlucar de Barrameda to Ozieri | 867.82 mi (1,396.62 km) |
| Sanlucar de Barrameda to Paceco | 1,039.35 mi (1,672.67 km) |
