| Dagenham to Orbetello | 815.21 mi (1,311.96 km) |
| Dagenham to Oria | 1,128.73 mi (1,816.52 km) |
| Dagenham to Oristano | 899.84 mi (1,448.15 km) |
| Dagenham to Orta Nova | 1,019.36 mi (1,640.50 km) |
| Dagenham to Orte | 850.08 mi (1,368.06 km) |
| Dagenham to Ortona | 921.91 mi (1,483.67 km) |
| Dagenham to Orvieto | 827.39 mi (1,331.56 km) |
| Dagenham to Orzinuovi | 616.38 mi (991.98 km) |
| Dagenham to Osimo | 832.84 mi (1,340.32 km) |
| Dagenham to Ospitaletto | 613.28 mi (986.97 km) |
| Dagenham to Ostuni | 1,114.98 mi (1,794.39 km) |
| Dagenham to Ottaviano | 1,004.23 mi (1,616.15 km) |
| Dagenham to Ovada | 616.71 mi (992.49 km) |
| Dagenham to Ozieri | 866.52 mi (1,394.53 km) |
| Dagenham to Paceco | 1,113.68 mi (1,792.30 km) |
