| Biddeford to Chojnice | 3,820.20 mi (6,148.01 km) |
| Biddeford to Chojnow | 3,840.10 mi (6,180.05 km) |
| Biddeford to Chorzow | 3,987.65 mi (6,417.50 km) |
| Biddeford to Choszczno | 3,759.43 mi (6,050.22 km) |
| Biddeford to Chrzanow | 4,010.63 mi (6,454.49 km) |
| Biddeford to Ciechanow | 3,959.44 mi (6,372.10 km) |
| Biddeford to Ciechocinek | 3,891.97 mi (6,263.51 km) |
| Biddeford to Cieszyn | 3,995.11 mi (6,429.51 km) |
| Biddeford to Czarna Bialostocka | 4,038.12 mi (6,498.73 km) |
| Biddeford to Czarnkow | 3,810.32 mi (6,132.12 km) |
| Biddeford to Czechowice-Dziedzice | 4,003.55 mi (6,443.09 km) |
| Biddeford to Czeladz | 3,991.51 mi (6,423.72 km) |
| Biddeford to Czersk Pomorski | 3,832.44 mi (6,167.71 km) |
| Biddeford to Czestochowa | 3,976.26 mi (6,399.17 km) |
| Biddeford to Czluchow | 3,814.66 mi (6,139.09 km) |
