| Perry Barr to Orbetello | 924.88 mi (1,488.44 km) |
| Perry Barr to Oria | 1,239.02 mi (1,994.01 km) |
| Perry Barr to Oristano | 1,003.63 mi (1,615.19 km) |
| Perry Barr to Orta Nova | 1,129.79 mi (1,818.22 km) |
| Perry Barr to Orte | 960.30 mi (1,545.45 km) |
| Perry Barr to Ortona | 1,032.34 mi (1,661.40 km) |
| Perry Barr to Orvieto | 937.61 mi (1,508.94 km) |
| Perry Barr to Orzinuovi | 726.82 mi (1,169.71 km) |
| Perry Barr to Osimo | 943.22 mi (1,517.96 km) |
| Perry Barr to Ospitaletto | 723.72 mi (1,164.72 km) |
| Perry Barr to Ostuni | 1,225.22 mi (1,971.81 km) |
| Perry Barr to Ottaviano | 1,114.55 mi (1,793.70 km) |
| Perry Barr to Ovada | 726.14 mi (1,168.60 km) |
| Perry Barr to Ozieri | 971.85 mi (1,564.05 km) |
| Perry Barr to Paceco | 1,221.32 mi (1,965.52 km) |
