| Keller to Orbetello | 5,538.24 mi (8,912.93 km) |
| Keller to Oria | 5,882.34 mi (9,466.71 km) |
| Keller to Oristano | 5,528.91 mi (8,897.92 km) |
| Keller to Orta Nova | 5,768.41 mi (9,283.37 km) |
| Keller to Orte | 5,585.51 mi (8,989.01 km) |
| Keller to Ortona | 5,671.75 mi (9,127.81 km) |
| Keller to Orvieto | 5,563.61 mi (8,953.77 km) |
| Keller to Orzinuovi | 5,367.69 mi (8,638.47 km) |
| Keller to Osimo | 5,587.18 mi (8,991.70 km) |
| Keller to Ospitaletto | 5,367.13 mi (8,637.56 km) |
| Keller to Ostuni | 5,869.94 mi (9,446.76 km) |
| Keller to Ottaviano | 5,738.90 mi (9,235.86 km) |
| Keller to Ovada | 5,345.67 mi (8,603.03 km) |
| Keller to Ozieri | 5,519.79 mi (8,883.25 km) |
| Keller to Paceco | 5,778.99 mi (9,300.38 km) |
