| Rennes to Castelli Calepio | 572.51 mi (921.37 km) |
| Rennes to Castelnovo ne' Monti | 629.57 mi (1,013.20 km) |
| Rennes to Castelnuovo Berardenga | 714.78 mi (1,150.32 km) |
| Rennes to Castelnuovo di Porto | 803.52 mi (1,293.15 km) |
| Rennes to Castelnuovo di Verona | 616.59 mi (992.31 km) |
| Rennes to Castelnuovo Rangone | 649.20 mi (1,044.78 km) |
| Rennes to Castelvetrano | 1,024.40 mi (1,648.61 km) |
| Rennes to Castelvetro di Modena | 651.49 mi (1,048.48 km) |
| Rennes to Castenaso | 674.12 mi (1,084.89 km) |
| Rennes to Castenedolo | 594.52 mi (956.79 km) |
| Rennes to Castiglion Fiorentino | 732.62 mi (1,179.04 km) |
| Rennes to Castiglione del Lago | 745.61 mi (1,199.95 km) |
| Rennes to Castiglione delle Stiviere | 605.48 mi (974.43 km) |
| Rennes to Castrolibero | 1,076.01 mi (1,731.66 km) |
| Rennes to Castrovillari | 1,054.02 mi (1,696.28 km) |
