| Olecko to Collegno | 907.98 mi (1,461.24 km) |
| Olecko to Cologno al Serio | 814.09 mi (1,310.16 km) |
| Olecko to Cologno Monzese | 830.08 mi (1,335.88 km) |
| Olecko to Colorno | 829.05 mi (1,334.23 km) |
| Olecko to Comacchio | 792.83 mi (1,275.93 km) |
| Olecko to Comiso | 1,238.96 mi (1,993.91 km) |
| Olecko to Como | 821.41 mi (1,321.93 km) |
| Olecko to Concordia Sagittaria | 713.26 mi (1,147.89 km) |
| Olecko to Concorezzo | 825.05 mi (1,327.80 km) |
| Olecko to Conegliano | 721.35 mi (1,160.90 km) |
| Olecko to Conselice | 812.70 mi (1,307.92 km) |
| Olecko to Conselve | 770.35 mi (1,239.76 km) |
| Olecko to Conversano | 936.45 mi (1,507.07 km) |
| Olecko to Copertino | 973.40 mi (1,566.54 km) |
| Olecko to Copparo | 790.42 mi (1,272.06 km) |
