| Bad Honnef am Rhein to Cassino | 706.09 mi (1,136.34 km) |
| Bad Honnef am Rhein to Castagneto Carducci | 540.53 mi (869.89 km) |
| Bad Honnef am Rhein to Castano Primo | 359.11 mi (577.93 km) |
| Bad Honnef am Rhein to Castel Bolognese | 486.37 mi (782.74 km) |
| Bad Honnef am Rhein to Castel Gandolfo | 666.85 mi (1,073.19 km) |
| Bad Honnef am Rhein to Castel Goffredo | 398.72 mi (641.68 km) |
| Bad Honnef am Rhein to Castel Maggiore | 461.95 mi (743.43 km) |
| Bad Honnef am Rhein to Castel Mella | 380.16 mi (611.81 km) |
| Bad Honnef am Rhein to Castel San Giorgio | 769.95 mi (1,239.12 km) |
| Bad Honnef am Rhein to Castel San Giovanni | 399.84 mi (643.47 km) |
| Bad Honnef am Rhein to Castel San Pietro Terme | 476.76 mi (767.27 km) |
| Bad Honnef am Rhein to Castel Volturno | 736.27 mi (1,184.91 km) |
| Bad Honnef am Rhein to Castelbuono | 940.77 mi (1,514.03 km) |
| Bad Honnef am Rhein to Casteldaccia | 923.49 mi (1,486.21 km) |
| Bad Honnef am Rhein to Castelfidardo | 578.00 mi (930.20 km) |
