| Prestatyn to Orbetello | 1,008.57 mi (1,623.14 km) |
| Prestatyn to Oria | 1,321.98 mi (2,127.52 km) |
| Prestatyn to Oristano | 1,085.10 mi (1,746.30 km) |
| Prestatyn to Orta Nova | 1,213.06 mi (1,952.24 km) |
| Prestatyn to Orte | 1,043.99 mi (1,680.13 km) |
| Prestatyn to Ortona | 1,115.66 mi (1,795.47 km) |
| Prestatyn to Orvieto | 1,021.30 mi (1,643.63 km) |
| Prestatyn to Orzinuovi | 810.32 mi (1,304.09 km) |
| Prestatyn to Osimo | 1,026.37 mi (1,651.78 km) |
| Prestatyn to Ospitaletto | 807.11 mi (1,298.92 km) |
| Prestatyn to Ostuni | 1,308.10 mi (2,105.19 km) |
| Prestatyn to Ottaviano | 1,198.20 mi (1,928.31 km) |
| Prestatyn to Ovada | 809.80 mi (1,303.25 km) |
| Prestatyn to Ozieri | 1,054.03 mi (1,696.30 km) |
| Prestatyn to Paceco | 1,304.40 mi (2,099.23 km) |
