| Biddeford to Collegno | 3,703.23 mi (5,959.77 km) |
| Biddeford to Cologno al Serio | 3,777.46 mi (6,079.23 km) |
| Biddeford to Cologno Monzese | 3,761.38 mi (6,053.35 km) |
| Biddeford to Colorno | 3,828.35 mi (6,161.14 km) |
| Biddeford to Comacchio | 3,912.82 mi (6,297.08 km) |
| Biddeford to Comiso | 4,310.20 mi (6,936.60 km) |
| Biddeford to Como | 3,743.94 mi (6,025.29 km) |
| Biddeford to Concordia Sagittaria | 3,903.61 mi (6,282.25 km) |
| Biddeford to Concorezzo | 3,761.80 mi (6,054.04 km) |
| Biddeford to Conegliano | 3,876.42 mi (6,238.49 km) |
| Biddeford to Conselice | 3,904.40 mi (6,283.52 km) |
| Biddeford to Conselve | 3,880.89 mi (6,245.69 km) |
| Biddeford to Conversano | 4,262.18 mi (6,859.31 km) |
| Biddeford to Copertino | 4,329.99 mi (6,968.45 km) |
| Biddeford to Copparo | 3,891.03 mi (6,262.01 km) |
