| Hockley to Orbetello | 803.85 mi (1,293.67 km) |
| Hockley to Oria | 1,114.14 mi (1,793.03 km) |
| Hockley to Oristano | 893.22 mi (1,437.50 km) |
| Hockley to Orta Nova | 1,005.36 mi (1,617.97 km) |
| Hockley to Orte | 837.63 mi (1,348.04 km) |
| Hockley to Ortona | 908.00 mi (1,461.28 km) |
| Hockley to Orvieto | 814.95 mi (1,311.54 km) |
| Hockley to Orzinuovi | 603.06 mi (970.53 km) |
| Hockley to Osimo | 818.58 mi (1,317.38 km) |
| Hockley to Ospitaletto | 599.61 mi (964.97 km) |
| Hockley to Ostuni | 1,100.26 mi (1,770.70 km) |
| Hockley to Ottaviano | 991.44 mi (1,595.57 km) |
| Hockley to Ovada | 605.79 mi (974.93 km) |
| Hockley to Ozieri | 858.98 mi (1,382.40 km) |
| Hockley to Paceco | 1,104.35 mi (1,777.28 km) |
