| Guyancourt to Cassino | 760.63 mi (1,224.12 km) |
| Guyancourt to Castagneto Carducci | 562.93 mi (905.94 km) |
| Guyancourt to Castano Primo | 385.00 mi (619.60 km) |
| Guyancourt to Castel Bolognese | 554.64 mi (892.61 km) |
| Guyancourt to Castel Gandolfo | 706.05 mi (1,136.28 km) |
| Guyancourt to Castel Goffredo | 462.32 mi (744.03 km) |
| Guyancourt to Castel Maggiore | 527.18 mi (848.41 km) |
| Guyancourt to Castel Mella | 441.45 mi (710.44 km) |
| Guyancourt to Castel San Giorgio | 827.57 mi (1,331.84 km) |
| Guyancourt to Castel San Giovanni | 431.86 mi (695.00 km) |
| Guyancourt to Castel San Pietro Terme | 542.64 mi (873.29 km) |
| Guyancourt to Castel Volturno | 786.01 mi (1,264.96 km) |
| Guyancourt to Castelbuono | 959.78 mi (1,544.62 km) |
| Guyancourt to Casteldaccia | 935.68 mi (1,505.83 km) |
| Guyancourt to Castelfidardo | 659.48 mi (1,061.33 km) |
