| Biddeford to Cividale del Friuli | 3,916.23 mi (6,302.57 km) |
| Biddeford to Civita Castellana | 4,008.56 mi (6,451.16 km) |
| Biddeford to Civitanova Marche | 4,028.83 mi (6,483.78 km) |
| Biddeford to Civitavecchia | 3,989.17 mi (6,419.95 km) |
| Biddeford to Civitella in Val di Chiana | 3,938.22 mi (6,337.95 km) |
| Biddeford to Clusone | 3,778.06 mi (6,080.20 km) |
| Biddeford to Coccaglio | 3,789.92 mi (6,099.28 km) |
| Biddeford to Codigoro | 3,905.34 mi (6,285.04 km) |
| Biddeford to Codogno | 3,791.81 mi (6,102.33 km) |
| Biddeford to Codroipo | 3,902.19 mi (6,279.96 km) |
| Biddeford to Cogoleto | 3,772.25 mi (6,070.84 km) |
| Biddeford to Colle di Val d'Elsa | 3,913.67 mi (6,298.44 km) |
| Biddeford to Colle Salvetti | 3,878.59 mi (6,241.99 km) |
| Biddeford to Collecchio | 3,827.49 mi (6,159.75 km) |
| Biddeford to Colleferro | 4,055.63 mi (6,526.90 km) |
