| Dubuque to Butzbach | 4,395.46 mi (7,073.80 km) |
| Dubuque to Buxtehude | 4,309.85 mi (6,936.04 km) |
| Dubuque to Cadolzburg | 4,514.79 mi (7,265.86 km) |
| Dubuque to Calbe | 4,444.06 mi (7,152.03 km) |
| Dubuque to Calw | 4,468.00 mi (7,190.54 km) |
| Dubuque to Castrop-Rauxel | 4,303.37 mi (6,925.60 km) |
| Dubuque to Celle | 4,356.82 mi (7,011.62 km) |
| Dubuque to Cham | 4,588.03 mi (7,383.73 km) |
| Dubuque to Chemnitz | 4,528.13 mi (7,287.32 km) |
| Dubuque to Clausthal-Zellerfeld | 4,398.75 mi (7,079.10 km) |
| Dubuque to Cloppenburg | 4,278.27 mi (6,885.21 km) |
| Dubuque to Coburg | 4,484.18 mi (7,216.60 km) |
| Dubuque to Coesfeld | 4,282.49 mi (6,892.00 km) |
| Dubuque to Cologne | 4,314.39 mi (6,943.33 km) |
| Dubuque to Coswig | 4,538.08 mi (7,303.34 km) |
