| Fountain to Orbetello | 5,541.16 mi (8,917.63 km) |
| Fountain to Oria | 5,866.95 mi (9,441.94 km) |
| Fountain to Oristano | 5,564.54 mi (8,955.26 km) |
| Fountain to Orta Nova | 5,757.10 mi (9,265.16 km) |
| Fountain to Orte | 5,582.52 mi (8,984.20 km) |
| Fountain to Ortona | 5,659.56 mi (9,108.19 km) |
| Fountain to Orvieto | 5,559.99 mi (8,947.94 km) |
| Fountain to Orzinuovi | 5,353.32 mi (8,615.34 km) |
| Fountain to Osimo | 5,570.97 mi (8,965.61 km) |
| Fountain to Ospitaletto | 5,350.88 mi (8,611.40 km) |
| Fountain to Ostuni | 5,853.14 mi (9,419.71 km) |
| Fountain to Ottaviano | 5,737.55 mi (9,233.69 km) |
| Fountain to Ovada | 5,343.27 mi (8,599.17 km) |
| Fountain to Ozieri | 5,548.04 mi (8,928.71 km) |
| Fountain to Paceco | 5,809.26 mi (9,349.10 km) |
