| Torrelodones to Orbetello | 792.87 mi (1,275.99 km) |
| Torrelodones to Oria | 1,129.40 mi (1,817.60 km) |
| Torrelodones to Oristano | 661.43 mi (1,064.46 km) |
| Torrelodones to Orta Nova | 1,024.03 mi (1,648.02 km) |
| Torrelodones to Orte | 852.66 mi (1,372.23 km) |
| Torrelodones to Ortona | 955.03 mi (1,536.98 km) |
| Torrelodones to Orvieto | 839.91 mi (1,351.71 km) |
| Torrelodones to Orzinuovi | 774.49 mi (1,246.42 km) |
| Torrelodones to Osimo | 914.13 mi (1,471.14 km) |
| Torrelodones to Ospitaletto | 784.64 mi (1,262.76 km) |
| Torrelodones to Ostuni | 1,124.86 mi (1,810.28 km) |
| Torrelodones to Ottaviano | 962.41 mi (1,548.84 km) |
| Torrelodones to Ovada | 697.46 mi (1,122.45 km) |
| Torrelodones to Ozieri | 678.04 mi (1,091.19 km) |
| Torrelodones to Paceco | 897.95 mi (1,445.11 km) |
