| Lake Ronkonkoma to Collegno | 3,915.69 mi (6,301.70 km) |
| Lake Ronkonkoma to Cologno al Serio | 3,991.83 mi (6,424.23 km) |
| Lake Ronkonkoma to Cologno Monzese | 3,975.45 mi (6,397.87 km) |
| Lake Ronkonkoma to Colorno | 4,042.18 mi (6,505.25 km) |
| Lake Ronkonkoma to Comacchio | 4,127.32 mi (6,642.27 km) |
| Lake Ronkonkoma to Comiso | 4,514.91 mi (7,266.05 km) |
| Lake Ronkonkoma to Como | 3,958.31 mi (6,370.29 km) |
| Lake Ronkonkoma to Concordia Sagittaria | 4,119.85 mi (6,630.26 km) |
| Lake Ronkonkoma to Concorezzo | 3,975.99 mi (6,398.74 km) |
| Lake Ronkonkoma to Conegliano | 4,092.54 mi (6,586.31 km) |
| Lake Ronkonkoma to Conselice | 4,118.45 mi (6,628.00 km) |
| Lake Ronkonkoma to Conselve | 4,095.93 mi (6,591.77 km) |
| Lake Ronkonkoma to Conversano | 4,474.69 mi (7,201.31 km) |
| Lake Ronkonkoma to Copertino | 4,542.22 mi (7,309.99 km) |
| Lake Ronkonkoma to Copparo | 4,105.61 mi (6,607.33 km) |
