| Boulogne-Billancourt to Castelfiorentino | 551.51 mi (887.57 km) |
| Boulogne-Billancourt to Castelfranco di Sopra | 572.00 mi (920.54 km) |
| Boulogne-Billancourt to Castelfranco di Sotto | 538.92 mi (867.31 km) |
| Boulogne-Billancourt to Castelfranco Emilia | 509.39 mi (819.79 km) |
| Boulogne-Billancourt to Castelfranco Veneto | 504.04 mi (811.18 km) |
| Boulogne-Billancourt to Castellabate | 858.80 mi (1,382.10 km) |
| Boulogne-Billancourt to Castellammare del Golfo | 916.09 mi (1,474.31 km) |
| Boulogne-Billancourt to Castellammare di Stabia | 820.84 mi (1,321.02 km) |
| Boulogne-Billancourt to Castellamonte | 350.72 mi (564.43 km) |
| Boulogne-Billancourt to Castellana Grotte | 911.77 mi (1,467.35 km) |
| Boulogne-Billancourt to Castellaneta | 914.48 mi (1,471.71 km) |
| Boulogne-Billancourt to Castellanza | 383.28 mi (616.84 km) |
| Boulogne-Billancourt to Castellarano | 500.33 mi (805.21 km) |
| Boulogne-Billancourt to Castelleone | 429.87 mi (691.81 km) |
| Boulogne-Billancourt to Castelletto sopra Ticino | 368.88 mi (593.65 km) |
