| Biddeford to Cernavoda | 4,571.12 mi (7,356.50 km) |
| Biddeford to Chitila | 4,483.87 mi (7,216.09 km) |
| Biddeford to Cisnadie | 4,362.60 mi (7,020.92 km) |
| Biddeford to Cluj-Napoca | 4,298.27 mi (6,917.40 km) |
| Biddeford to Codlea | 4,413.63 mi (7,103.04 km) |
| Biddeford to Comanesti | 4,422.16 mi (7,116.79 km) |
| Biddeford to Comarnic | 4,439.44 mi (7,144.59 km) |
| Biddeford to Constanta | 4,601.72 mi (7,405.75 km) |
| Biddeford to Corabia | 4,455.84 mi (7,170.99 km) |
| Biddeford to Costesti | 4,433.82 mi (7,135.54 km) |
| Biddeford to Covasna | 4,436.01 mi (7,139.08 km) |
| Biddeford to Craiova | 4,405.44 mi (7,089.87 km) |
| Biddeford to Cristuru Secuiesc | 4,373.51 mi (7,038.48 km) |
| Biddeford to Cugir | 4,326.49 mi (6,962.81 km) |
| Biddeford to Cumpana | 4,601.04 mi (7,404.66 km) |
