| Catonsville to Collegno | 4,135.10 mi (6,654.80 km) |
| Catonsville to Cologno al Serio | 4,210.72 mi (6,776.50 km) |
| Catonsville to Cologno Monzese | 4,194.43 mi (6,750.29 km) |
| Catonsville to Colorno | 4,261.24 mi (6,857.80 km) |
| Catonsville to Comacchio | 4,346.18 mi (6,994.49 km) |
| Catonsville to Comiso | 4,735.22 mi (7,620.60 km) |
| Catonsville to Como | 4,177.20 mi (6,722.56 km) |
| Catonsville to Concordia Sagittaria | 4,338.07 mi (6,981.45 km) |
| Catonsville to Concorezzo | 4,194.94 mi (6,751.10 km) |
| Catonsville to Conegliano | 4,310.81 mi (6,937.57 km) |
| Catonsville to Conselice | 4,337.44 mi (6,980.44 km) |
| Catonsville to Conselve | 4,314.61 mi (6,943.69 km) |
| Catonsville to Conversano | 4,694.11 mi (7,554.45 km) |
| Catonsville to Copertino | 4,761.71 mi (7,663.24 km) |
| Catonsville to Copparo | 4,324.44 mi (6,959.51 km) |
