| Troisdorf to Cologno al Serio | 380.00 mi (611.56 km) |
| Troisdorf to Cologno Monzese | 378.15 mi (608.58 km) |
| Troisdorf to Colorno | 433.00 mi (696.85 km) |
| Troisdorf to Comacchio | 482.55 mi (776.59 km) |
| Troisdorf to Comiso | 1,026.00 mi (1,651.18 km) |
| Troisdorf to Como | 357.03 mi (574.58 km) |
| Troisdorf to Concordia Sagittaria | 435.89 mi (701.50 km) |
| Troisdorf to Concorezzo | 374.76 mi (603.12 km) |
| Troisdorf to Conegliano | 414.19 mi (666.57 km) |
| Troisdorf to Conselice | 486.39 mi (782.78 km) |
| Troisdorf to Conselve | 442.71 mi (712.48 km) |
| Troisdorf to Conversano | 830.61 mi (1,336.74 km) |
| Troisdorf to Copertino | 897.53 mi (1,444.44 km) |
| Troisdorf to Copparo | 462.50 mi (744.32 km) |
| Troisdorf to Corato | 800.52 mi (1,288.32 km) |
