| Helensburgh to Creutzwald | 670.27 mi (1,078.70 km) |
| Helensburgh to Croissy-sur-Seine | 571.31 mi (919.44 km) |
| Helensburgh to Croix | 491.12 mi (790.39 km) |
| Helensburgh to Crosne | 588.08 mi (946.42 km) |
| Helensburgh to Cuers | 1,004.00 mi (1,615.78 km) |
| Helensburgh to Cugnaux | 902.97 mi (1,453.19 km) |
| Helensburgh to Cusset | 768.58 mi (1,236.91 km) |
| Helensburgh to Dammarie-le-Lys | 603.94 mi (971.94 km) |
| Helensburgh to Dammartin-en-Goele | 572.46 mi (921.28 km) |
| Helensburgh to Dardilly | 815.96 mi (1,313.17 km) |
| Helensburgh to Darnetal | 516.10 mi (830.58 km) |
| Helensburgh to Dax | 865.67 mi (1,393.16 km) |
| Helensburgh to Decines-Charpieu | 822.70 mi (1,324.00 km) |
| Helensburgh to Denain | 516.78 mi (831.67 km) |
| Helensburgh to Deuil-la-Barre | 569.26 mi (916.13 km) |
