| Cantillana to Orbetello | 959.03 mi (1,543.42 km) |
| Cantillana to Oria | 1,270.25 mi (2,044.28 km) |
| Cantillana to Oristano | 791.60 mi (1,273.95 km) |
| Cantillana to Orta Nova | 1,173.61 mi (1,888.75 km) |
| Cantillana to Orte | 1,017.45 mi (1,637.43 km) |
| Cantillana to Ortona | 1,116.49 mi (1,796.82 km) |
| Cantillana to Orvieto | 1,008.09 mi (1,622.37 km) |
| Cantillana to Orzinuovi | 974.39 mi (1,568.13 km) |
| Cantillana to Osimo | 1,088.65 mi (1,752.01 km) |
| Cantillana to Ospitaletto | 985.43 mi (1,585.90 km) |
| Cantillana to Ostuni | 1,268.15 mi (2,040.89 km) |
| Cantillana to Ottaviano | 1,106.54 mi (1,780.80 km) |
| Cantillana to Ovada | 894.22 mi (1,439.11 km) |
| Cantillana to Ozieri | 819.94 mi (1,319.56 km) |
| Cantillana to Paceco | 1,001.56 mi (1,611.85 km) |
