| Hitchin to Orbetello | 848.11 mi (1,364.91 km) |
| Hitchin to Oria | 1,159.94 mi (1,866.75 km) |
| Hitchin to Oristano | 933.31 mi (1,502.02 km) |
| Hitchin to Orta Nova | 1,050.99 mi (1,691.40 km) |
| Hitchin to Orte | 882.55 mi (1,420.33 km) |
| Hitchin to Ortona | 953.59 mi (1,534.65 km) |
| Hitchin to Orvieto | 859.87 mi (1,383.82 km) |
| Hitchin to Orzinuovi | 648.40 mi (1,043.49 km) |
| Hitchin to Osimo | 864.29 mi (1,390.93 km) |
| Hitchin to Ospitaletto | 645.09 mi (1,038.17 km) |
| Hitchin to Ostuni | 1,146.10 mi (1,844.46 km) |
| Hitchin to Ottaviano | 1,036.55 mi (1,668.16 km) |
| Hitchin to Ovada | 649.73 mi (1,045.64 km) |
| Hitchin to Ozieri | 900.03 mi (1,448.46 km) |
| Hitchin to Paceco | 1,147.07 mi (1,846.04 km) |
