| Catalca to Orbetello | 891.62 mi (1,434.93 km) |
| Catalca to Oria | 567.62 mi (913.50 km) |
| Catalca to Oristano | 1,044.87 mi (1,681.55 km) |
| Catalca to Orta Nova | 662.09 mi (1,065.52 km) |
| Catalca to Orte | 831.80 mi (1,338.66 km) |
| Catalca to Ortona | 728.91 mi (1,173.06 km) |
| Catalca to Orvieto | 846.25 mi (1,361.91 km) |
| Catalca to Orzinuovi | 974.95 mi (1,569.03 km) |
| Catalca to Osimo | 781.13 mi (1,257.11 km) |
| Catalca to Ospitaletto | 970.42 mi (1,561.74 km) |
| Catalca to Ostuni | 568.20 mi (914.43 km) |
| Catalca to Ottaviano | 728.82 mi (1,172.93 km) |
| Catalca to Ovada | 1,029.04 mi (1,656.08 km) |
| Catalca to Ozieri | 1,015.45 mi (1,634.21 km) |
| Catalca to Paceco | 873.88 mi (1,406.37 km) |
