| Palencia to Orbetello | 804.96 mi (1,295.46 km) |
| Palencia to Oria | 1,152.86 mi (1,855.35 km) |
| Palencia to Oristano | 699.41 mi (1,125.59 km) |
| Palencia to Orta Nova | 1,043.44 mi (1,679.26 km) |
| Palencia to Orte | 864.59 mi (1,391.43 km) |
| Palencia to Ortona | 967.62 mi (1,557.23 km) |
| Palencia to Orvieto | 849.64 mi (1,367.36 km) |
| Palencia to Orzinuovi | 758.16 mi (1,220.15 km) |
| Palencia to Osimo | 917.88 mi (1,477.19 km) |
| Palencia to Ospitaletto | 767.20 mi (1,234.69 km) |
| Palencia to Ostuni | 1,146.91 mi (1,845.78 km) |
| Palencia to Ottaviano | 986.03 mi (1,586.87 km) |
| Palencia to Ovada | 685.89 mi (1,103.84 km) |
| Palencia to Ozieri | 708.80 mi (1,140.71 km) |
| Palencia to Paceco | 944.28 mi (1,519.67 km) |
