| Hoddesdon to Orbetello | 830.82 mi (1,337.08 km) |
| Hoddesdon to Oria | 1,143.06 mi (1,839.58 km) |
| Hoddesdon to Oristano | 916.33 mi (1,474.69 km) |
| Hoddesdon to Orta Nova | 1,033.98 mi (1,664.03 km) |
| Hoddesdon to Orte | 865.33 mi (1,392.61 km) |
| Hoddesdon to Ortona | 936.56 mi (1,507.25 km) |
| Hoddesdon to Orvieto | 842.64 mi (1,356.10 km) |
| Hoddesdon to Orzinuovi | 631.28 mi (1,015.94 km) |
| Hoddesdon to Osimo | 847.33 mi (1,363.64 km) |
| Hoddesdon to Ospitaletto | 628.02 mi (1,010.70 km) |
| Hoddesdon to Ostuni | 1,129.24 mi (1,817.34 km) |
| Hoddesdon to Ottaviano | 1,019.36 mi (1,640.50 km) |
| Hoddesdon to Ovada | 632.43 mi (1,017.80 km) |
| Hoddesdon to Ozieri | 882.92 mi (1,420.92 km) |
| Hoddesdon to Paceco | 1,129.80 mi (1,818.24 km) |
