| Caldas de Reyes to Orbetello | 1,008.62 mi (1,623.21 km) |
| Caldas de Reyes to Oria | 1,360.65 mi (2,189.75 km) |
| Caldas de Reyes to Oristano | 912.47 mi (1,468.47 km) |
| Caldas de Reyes to Orta Nova | 1,249.68 mi (2,011.16 km) |
| Caldas de Reyes to Orte | 1,067.74 mi (1,718.37 km) |
| Caldas de Reyes to Ortona | 1,170.53 mi (1,883.78 km) |
| Caldas de Reyes to Orvieto | 1,051.60 mi (1,692.39 km) |
| Caldas de Reyes to Orzinuovi | 940.77 mi (1,514.03 km) |
| Caldas de Reyes to Osimo | 1,115.42 mi (1,795.10 km) |
| Caldas de Reyes to Ospitaletto | 948.55 mi (1,526.55 km) |
| Caldas de Reyes to Ostuni | 1,354.08 mi (2,179.18 km) |
| Caldas de Reyes to Ottaviano | 1,194.39 mi (1,922.18 km) |
| Caldas de Reyes to Ovada | 874.21 mi (1,406.90 km) |
| Caldas de Reyes to Ozieri | 920.46 mi (1,481.33 km) |
| Caldas de Reyes to Paceco | 1,157.86 mi (1,863.40 km) |
