| Great Bookham to Orbetello | 818.16 mi (1,316.70 km) |
| Great Bookham to Oria | 1,136.65 mi (1,829.27 km) |
| Great Bookham to Oristano | 895.83 mi (1,441.69 km) |
| Great Bookham to Orta Nova | 1,026.35 mi (1,651.75 km) |
| Great Bookham to Orte | 854.67 mi (1,375.45 km) |
| Great Bookham to Ortona | 928.81 mi (1,494.78 km) |
| Great Bookham to Orvieto | 832.00 mi (1,338.97 km) |
| Great Bookham to Orzinuovi | 622.67 mi (1,002.09 km) |
| Great Bookham to Osimo | 840.38 mi (1,352.46 km) |
| Great Bookham to Ospitaletto | 620.12 mi (997.99 km) |
| Great Bookham to Ostuni | 1,123.13 mi (1,807.50 km) |
| Great Bookham to Ottaviano | 1,009.25 mi (1,624.23 km) |
| Great Bookham to Ovada | 619.23 mi (996.56 km) |
| Great Bookham to Ozieri | 863.81 mi (1,390.17 km) |
| Great Bookham to Paceco | 1,113.36 mi (1,791.78 km) |
