| Ostrow Mazowiecka to Cortona | 800.11 mi (1,287.66 km) |
| Ostrow Mazowiecka to Cosenza | 970.55 mi (1,561.95 km) |
| Ostrow Mazowiecka to Cossato | 794.25 mi (1,278.22 km) |
| Ostrow Mazowiecka to Costa Volpino | 715.59 mi (1,151.62 km) |
| Ostrow Mazowiecka to Creazzo | 686.81 mi (1,105.32 km) |
| Ostrow Mazowiecka to Crema | 752.74 mi (1,211.41 km) |
| Ostrow Mazowiecka to Cremona | 753.39 mi (1,212.47 km) |
| Ostrow Mazowiecka to Crevalcore | 741.17 mi (1,192.80 km) |
| Ostrow Mazowiecka to Crispiano | 870.99 mi (1,401.72 km) |
| Ostrow Mazowiecka to Crosia | 946.12 mi (1,522.63 km) |
| Ostrow Mazowiecka to Crotone | 974.65 mi (1,568.54 km) |
| Ostrow Mazowiecka to Cuneo | 873.63 mi (1,405.97 km) |
| Ostrow Mazowiecka to Cuorgne | 820.79 mi (1,320.93 km) |
| Ostrow Mazowiecka to Cusano Milanino | 760.19 mi (1,223.41 km) |
| Ostrow Mazowiecka to Cutro | 979.56 mi (1,576.46 km) |
