| Ostrow Mazowiecka to Collegno | 838.52 mi (1,349.46 km) |
| Ostrow Mazowiecka to Cologno al Serio | 741.23 mi (1,192.90 km) |
| Ostrow Mazowiecka to Cologno Monzese | 758.05 mi (1,219.97 km) |
| Ostrow Mazowiecka to Colorno | 752.84 mi (1,211.58 km) |
| Ostrow Mazowiecka to Comacchio | 712.25 mi (1,146.25 km) |
| Ostrow Mazowiecka to Comiso | 1,150.53 mi (1,851.60 km) |
| Ostrow Mazowiecka to Como | 750.73 mi (1,208.18 km) |
| Ostrow Mazowiecka to Concordia Sagittaria | 633.46 mi (1,019.46 km) |
| Ostrow Mazowiecka to Concorezzo | 753.08 mi (1,211.97 km) |
| Ostrow Mazowiecka to Conegliano | 643.13 mi (1,035.01 km) |
| Ostrow Mazowiecka to Conselice | 732.48 mi (1,178.82 km) |
| Ostrow Mazowiecka to Conselve | 691.55 mi (1,112.94 km) |
| Ostrow Mazowiecka to Conversano | 847.75 mi (1,364.32 km) |
| Ostrow Mazowiecka to Copertino | 884.76 mi (1,423.88 km) |
| Ostrow Mazowiecka to Copparo | 710.97 mi (1,144.19 km) |
