| Houghton Regis to Cividale del Friuli | 747.17 mi (1,202.46 km) |
| Houghton Regis to Civita Castellana | 897.80 mi (1,444.87 km) |
| Houghton Regis to Civitanova Marche | 888.58 mi (1,430.03 km) |
| Houghton Regis to Civitavecchia | 889.80 mi (1,431.99 km) |
| Houghton Regis to Civitella in Val di Chiana | 815.46 mi (1,312.36 km) |
| Houghton Regis to Clusone | 630.92 mi (1,015.37 km) |
| Houghton Regis to Coccaglio | 647.70 mi (1,042.36 km) |
| Houghton Regis to Codigoro | 756.67 mi (1,217.74 km) |
| Houghton Regis to Codogno | 659.27 mi (1,060.99 km) |
| Houghton Regis to Codroipo | 735.91 mi (1,184.33 km) |
| Houghton Regis to Cogoleto | 668.50 mi (1,075.84 km) |
| Houghton Regis to Colle di Val d'Elsa | 797.87 mi (1,284.05 km) |
| Houghton Regis to Colle Salvetti | 766.89 mi (1,234.18 km) |
| Houghton Regis to Collecchio | 697.06 mi (1,121.81 km) |
| Houghton Regis to Colleferro | 947.62 mi (1,525.04 km) |
