| Lockport to Orbetello | 4,763.50 mi (7,666.10 km) |
| Lockport to Oria | 5,104.95 mi (8,215.62 km) |
| Lockport to Oristano | 4,761.79 mi (7,663.37 km) |
| Lockport to Orta Nova | 4,991.51 mi (8,033.05 km) |
| Lockport to Orte | 4,809.75 mi (7,740.54 km) |
| Lockport to Ortona | 4,894.56 mi (7,877.04 km) |
| Lockport to Orvieto | 4,787.70 mi (7,705.06 km) |
| Lockport to Orzinuovi | 4,589.74 mi (7,386.47 km) |
| Lockport to Osimo | 4,809.26 mi (7,739.76 km) |
| Lockport to Ospitaletto | 4,588.90 mi (7,385.12 km) |
| Lockport to Ostuni | 5,092.32 mi (8,195.29 km) |
| Lockport to Ottaviano | 4,963.68 mi (7,988.27 km) |
| Lockport to Ovada | 4,569.63 mi (7,354.10 km) |
| Lockport to Ozieri | 4,750.70 mi (7,645.51 km) |
| Lockport to Paceco | 5,010.96 mi (8,064.36 km) |
