| Falmouth to Orbetello | 939.16 mi (1,511.43 km) |
| Falmouth to Oria | 1,281.07 mi (2,061.68 km) |
| Falmouth to Oristano | 969.66 mi (1,560.51 km) |
| Falmouth to Orta Nova | 1,166.87 mi (1,877.90 km) |
| Falmouth to Orte | 984.49 mi (1,584.38 km) |
| Falmouth to Ortona | 1,070.40 mi (1,722.64 km) |
| Falmouth to Orvieto | 962.42 mi (1,548.87 km) |
| Falmouth to Orzinuovi | 768.27 mi (1,236.40 km) |
| Falmouth to Osimo | 987.09 mi (1,588.56 km) |
| Falmouth to Ospitaletto | 768.72 mi (1,237.13 km) |
| Falmouth to Ostuni | 1,268.94 mi (2,042.17 km) |
| Falmouth to Ottaviano | 1,138.65 mi (1,832.47 km) |
| Falmouth to Ovada | 744.35 mi (1,197.91 km) |
| Falmouth to Ozieri | 947.54 mi (1,524.93 km) |
| Falmouth to Paceco | 1,207.46 mi (1,943.22 km) |
