| Syston to Orbetello | 908.98 mi (1,462.86 km) |
| Syston to Oria | 1,217.80 mi (1,959.86 km) |
| Syston to Oristano | 995.24 mi (1,601.68 km) |
| Syston to Orta Nova | 1,109.59 mi (1,785.72 km) |
| Syston to Orte | 942.68 mi (1,517.10 km) |
| Syston to Ortona | 1,012.32 mi (1,629.17 km) |
| Syston to Orvieto | 920.00 mi (1,480.60 km) |
| Syston to Orzinuovi | 707.82 mi (1,139.13 km) |
| Syston to Osimo | 922.66 mi (1,484.87 km) |
| Syston to Ospitaletto | 704.18 mi (1,133.27 km) |
| Syston to Ostuni | 1,203.79 mi (1,937.31 km) |
| Syston to Ottaviano | 1,096.37 mi (1,764.44 km) |
| Syston to Ovada | 710.85 mi (1,144.00 km) |
| Syston to Ozieri | 961.99 mi (1,548.18 km) |
| Syston to Paceco | 1,208.80 mi (1,945.37 km) |
