| Swallownest to Orbetello | 949.38 mi (1,527.88 km) |
| Swallownest to Oria | 1,253.43 mi (2,017.20 km) |
| Swallownest to Oristano | 1,039.73 mi (1,673.29 km) |
| Swallownest to Orta Nova | 1,146.30 mi (1,844.79 km) |
| Swallownest to Orte | 981.76 mi (1,579.99 km) |
| Swallownest to Ortona | 1,049.26 mi (1,688.62 km) |
| Swallownest to Orvieto | 959.10 mi (1,543.53 km) |
| Swallownest to Orzinuovi | 746.02 mi (1,200.60 km) |
| Swallownest to Osimo | 959.17 mi (1,543.63 km) |
| Swallownest to Ospitaletto | 741.92 mi (1,194.00 km) |
| Swallownest to Ostuni | 1,239.21 mi (1,994.31 km) |
| Swallownest to Ottaviano | 1,134.88 mi (1,826.41 km) |
| Swallownest to Ovada | 751.86 mi (1,210.01 km) |
| Swallownest to Ozieri | 1,005.87 mi (1,618.79 km) |
| Swallownest to Paceco | 1,251.20 mi (2,013.60 km) |
