| Hammond to Orbetello | 4,740.61 mi (7,629.28 km) |
| Hammond to Oria | 5,082.53 mi (8,179.55 km) |
| Hammond to Oristano | 4,738.00 mi (7,625.07 km) |
| Hammond to Orta Nova | 4,969.00 mi (7,996.83 km) |
| Hammond to Orte | 4,787.03 mi (7,703.98 km) |
| Hammond to Ortona | 4,872.10 mi (7,840.89 km) |
| Hammond to Orvieto | 4,765.01 mi (7,668.54 km) |
| Hammond to Orzinuovi | 4,567.42 mi (7,350.55 km) |
| Hammond to Osimo | 4,786.94 mi (7,703.84 km) |
| Hammond to Ospitaletto | 4,566.64 mi (7,349.29 km) |
| Hammond to Ostuni | 5,069.95 mi (8,159.30 km) |
| Hammond to Ottaviano | 4,940.88 mi (7,951.58 km) |
| Hammond to Ovada | 4,546.95 mi (7,317.60 km) |
| Hammond to Ozieri | 4,727.11 mi (7,607.54 km) |
| Hammond to Paceco | 4,987.27 mi (8,026.24 km) |
