| Ostrow Mazowiecka to Coin | 1,701.02 mi (2,737.52 km) |
| Ostrow Mazowiecka to Colindres | 1,327.91 mi (2,137.06 km) |
| Ostrow Mazowiecka to Collado-Villalba | 1,474.60 mi (2,373.13 km) |
| Ostrow Mazowiecka to Colmenar Viejo | 1,464.16 mi (2,356.34 km) |
| Ostrow Mazowiecka to Colmenarejo | 1,478.37 mi (2,379.21 km) |
| Ostrow Mazowiecka to Conil de la Frontera | 1,770.36 mi (2,849.11 km) |
| Ostrow Mazowiecka to Consuegra | 1,516.37 mi (2,440.36 km) |
| Ostrow Mazowiecka to Corbera de Llobregat | 1,217.61 mi (1,959.55 km) |
| Ostrow Mazowiecka to Cordoba | 1,639.09 mi (2,637.87 km) |
| Ostrow Mazowiecka to Coria del Rio | 1,716.68 mi (2,762.73 km) |
| Ostrow Mazowiecka to Crevillente | 1,477.96 mi (2,378.55 km) |
| Ostrow Mazowiecka to Cuarte de Huerva | 1,312.86 mi (2,112.85 km) |
| Ostrow Mazowiecka to Cubellas | 1,237.19 mi (1,991.06 km) |
| Ostrow Mazowiecka to Cuellar | 1,450.39 mi (2,334.17 km) |
| Ostrow Mazowiecka to Cuenca | 1,432.52 mi (2,305.41 km) |
