| Havant to Orbetello | 818.07 mi (1,316.55 km) |
| Havant to Oria | 1,143.07 mi (1,839.60 km) |
| Havant to Oristano | 886.01 mi (1,425.89 km) |
| Havant to Orta Nova | 1,031.57 mi (1,660.16 km) |
| Havant to Orte | 856.79 mi (1,378.88 km) |
| Havant to Ortona | 934.06 mi (1,503.22 km) |
| Havant to Orvieto | 834.19 mi (1,342.50 km) |
| Havant to Orzinuovi | 627.75 mi (1,010.27 km) |
| Havant to Osimo | 846.67 mi (1,362.59 km) |
| Havant to Ospitaletto | 626.00 mi (1,007.44 km) |
| Havant to Ostuni | 1,129.87 mi (1,818.35 km) |
| Havant to Ottaviano | 1,011.74 mi (1,628.24 km) |
| Havant to Ovada | 619.10 mi (996.34 km) |
| Havant to Ozieri | 855.83 mi (1,377.32 km) |
| Havant to Paceco | 1,108.30 mi (1,783.64 km) |
