| Sanlucar la Mayor to Orbetello | 984.49 mi (1,584.38 km) |
| Sanlucar la Mayor to Oria | 1,294.68 mi (2,083.59 km) |
| Sanlucar la Mayor to Oristano | 816.00 mi (1,313.22 km) |
| Sanlucar la Mayor to Orta Nova | 1,198.45 mi (1,928.71 km) |
| Sanlucar la Mayor to Orte | 1,042.85 mi (1,678.30 km) |
| Sanlucar la Mayor to Ortona | 1,141.76 mi (1,837.48 km) |
| Sanlucar la Mayor to Orvieto | 1,033.58 mi (1,663.38 km) |
| Sanlucar la Mayor to Orzinuovi | 1,000.16 mi (1,609.60 km) |
| Sanlucar la Mayor to Osimo | 1,114.25 mi (1,793.21 km) |
| Sanlucar la Mayor to Ospitaletto | 1,011.20 mi (1,627.36 km) |
| Sanlucar la Mayor to Ostuni | 1,292.69 mi (2,080.38 km) |
| Sanlucar la Mayor to Ottaviano | 1,131.19 mi (1,820.48 km) |
| Sanlucar la Mayor to Ovada | 920.01 mi (1,480.61 km) |
| Sanlucar la Mayor to Ozieri | 844.75 mi (1,359.49 km) |
| Sanlucar la Mayor to Paceco | 1,024.37 mi (1,648.56 km) |
