| Bad Honnef am Rhein to Civita Castellana | 626.98 mi (1,009.03 km) |
| Bad Honnef am Rhein to Civitanova Marche | 592.46 mi (953.48 km) |
| Bad Honnef am Rhein to Civitavecchia | 629.05 mi (1,012.37 km) |
| Bad Honnef am Rhein to Civitella in Val di Chiana | 542.09 mi (872.41 km) |
| Bad Honnef am Rhein to Clusone | 351.97 mi (566.45 km) |
| Bad Honnef am Rhein to Coccaglio | 373.29 mi (600.75 km) |
| Bad Honnef am Rhein to Codigoro | 461.13 mi (742.12 km) |
| Bad Honnef am Rhein to Codogno | 395.92 mi (637.17 km) |
| Bad Honnef am Rhein to Codroipo | 417.55 mi (671.98 km) |
| Bad Honnef am Rhein to Cogoleto | 437.24 mi (703.67 km) |
| Bad Honnef am Rhein to Colle di Val d'Elsa | 533.13 mi (857.99 km) |
| Bad Honnef am Rhein to Colle Salvetti | 510.14 mi (820.99 km) |
| Bad Honnef am Rhein to Collecchio | 430.29 mi (692.48 km) |
| Bad Honnef am Rhein to Colleferro | 674.64 mi (1,085.72 km) |
| Bad Honnef am Rhein to Collegno | 385.01 mi (619.61 km) |
