| East Barnet to Orbetello | 829.46 mi (1,334.89 km) |
| East Barnet to Oria | 1,143.54 mi (1,840.35 km) |
| East Barnet to Oristano | 912.62 mi (1,468.72 km) |
| East Barnet to Orta Nova | 1,034.10 mi (1,664.22 km) |
| East Barnet to Orte | 864.56 mi (1,391.37 km) |
| East Barnet to Ortona | 936.64 mi (1,507.37 km) |
| East Barnet to Orvieto | 841.87 mi (1,354.86 km) |
| East Barnet to Orzinuovi | 631.04 mi (1,015.56 km) |
| East Barnet to Osimo | 847.61 mi (1,364.10 km) |
| East Barnet to Ospitaletto | 627.98 mi (1,010.64 km) |
| East Barnet to Ostuni | 1,129.80 mi (1,818.24 km) |
| East Barnet to Ottaviano | 1,018.77 mi (1,639.55 km) |
| East Barnet to Ovada | 630.86 mi (1,015.28 km) |
| East Barnet to Ozieri | 879.63 mi (1,415.64 km) |
| East Barnet to Paceco | 1,127.36 mi (1,814.31 km) |
