| Cliftonville to Orbetello | 770.95 mi (1,240.72 km) |
| Cliftonville to Oria | 1,078.92 mi (1,736.36 km) |
| Cliftonville to Oristano | 864.96 mi (1,392.02 km) |
| Cliftonville to Orta Nova | 970.49 mi (1,561.86 km) |
| Cliftonville to Orte | 803.86 mi (1,293.68 km) |
| Cliftonville to Ortona | 873.20 mi (1,405.28 km) |
| Cliftonville to Orvieto | 781.19 mi (1,257.20 km) |
| Cliftonville to Orzinuovi | 568.73 mi (915.28 km) |
| Cliftonville to Osimo | 783.60 mi (1,261.08 km) |
| Cliftonville to Ospitaletto | 565.04 mi (909.35 km) |
| Cliftonville to Ostuni | 1,064.98 mi (1,713.92 km) |
| Cliftonville to Ottaviano | 957.37 mi (1,540.74 km) |
| Cliftonville to Ovada | 573.40 mi (922.79 km) |
| Cliftonville to Ozieri | 829.74 mi (1,335.34 km) |
| Cliftonville to Paceco | 1,073.18 mi (1,727.11 km) |
