| San Fernando de Henares to Orbetello | 775.49 mi (1,248.03 km) |
| San Fernando de Henares to Oria | 1,110.12 mi (1,786.57 km) |
| San Fernando de Henares to Oristano | 640.80 mi (1,031.27 km) |
| San Fernando de Henares to Orta Nova | 1,005.36 mi (1,617.96 km) |
| San Fernando de Henares to Orte | 835.23 mi (1,344.17 km) |
| San Fernando de Henares to Ortona | 937.38 mi (1,508.57 km) |
| San Fernando de Henares to Orvieto | 822.83 mi (1,324.21 km) |
| San Fernando de Henares to Orzinuovi | 761.97 mi (1,226.28 km) |
| San Fernando de Henares to Osimo | 897.88 mi (1,444.99 km) |
| San Fernando de Henares to Ospitaletto | 772.32 mi (1,242.92 km) |
| San Fernando de Henares to Ostuni | 1,105.76 mi (1,779.55 km) |
| San Fernando de Henares to Ottaviano | 943.22 mi (1,517.96 km) |
| San Fernando de Henares to Ovada | 684.22 mi (1,101.15 km) |
| San Fernando de Henares to Ozieri | 658.25 mi (1,059.35 km) |
| San Fernando de Henares to Paceco | 876.28 mi (1,410.23 km) |
