| Bonn to Civita Castellana | 634.87 mi (1,021.72 km) |
| Bonn to Civitanova Marche | 600.62 mi (966.61 km) |
| Bonn to Civitavecchia | 636.80 mi (1,024.83 km) |
| Bonn to Civitella in Val di Chiana | 549.96 mi (885.07 km) |
| Bonn to Clusone | 359.72 mi (578.91 km) |
| Bonn to Coccaglio | 380.98 mi (613.13 km) |
| Bonn to Codigoro | 469.24 mi (755.16 km) |
| Bonn to Codogno | 403.44 mi (649.28 km) |
| Bonn to Codroipo | 425.80 mi (685.25 km) |
| Bonn to Cogoleto | 444.18 mi (714.84 km) |
| Bonn to Colle di Val d'Elsa | 540.86 mi (870.43 km) |
| Bonn to Colle Salvetti | 517.71 mi (833.17 km) |
| Bonn to Collecchio | 437.93 mi (704.78 km) |
| Bonn to Colleferro | 682.58 mi (1,098.50 km) |
| Bonn to Collegno | 391.39 mi (629.88 km) |
