| Heswall to Orbetello | 999.16 mi (1,607.98 km) |
| Heswall to Oria | 1,311.38 mi (2,110.46 km) |
| Heswall to Oristano | 1,077.56 mi (1,734.17 km) |
| Heswall to Orta Nova | 1,202.69 mi (1,935.54 km) |
| Heswall to Orte | 1,034.17 mi (1,664.34 km) |
| Heswall to Ortona | 1,105.31 mi (1,778.83 km) |
| Heswall to Orvieto | 1,011.49 mi (1,627.84 km) |
| Heswall to Orzinuovi | 800.19 mi (1,287.77 km) |
| Heswall to Osimo | 1,015.91 mi (1,634.94 km) |
| Heswall to Ospitaletto | 796.86 mi (1,282.42 km) |
| Heswall to Ostuni | 1,297.46 mi (2,088.05 km) |
| Heswall to Ottaviano | 1,188.27 mi (1,912.34 km) |
| Heswall to Ovada | 800.49 mi (1,288.27 km) |
| Heswall to Ozieri | 1,046.11 mi (1,683.54 km) |
| Heswall to Paceco | 1,295.84 mi (2,085.46 km) |
