| Portland to Carpentras | 5,467.87 mi (8,799.68 km) |
| Portland to Carquefou | 5,100.27 mi (8,208.09 km) |
| Portland to Carqueiranne | 5,551.58 mi (8,934.41 km) |
| Portland to Carrieres-sous-Poissy | 5,109.72 mi (8,223.30 km) |
| Portland to Carrieres-sur-Seine | 5,118.57 mi (8,237.54 km) |
| Portland to Carros | 5,543.39 mi (8,921.22 km) |
| Portland to Carvin | 5,048.62 mi (8,124.97 km) |
| Portland to Castanet-Tolosan | 5,395.84 mi (8,683.77 km) |
| Portland to Castelginest | 5,384.00 mi (8,664.71 km) |
| Portland to Castelnau-le-Lez | 5,459.16 mi (8,785.67 km) |
| Portland to Castelnaudary | 5,420.36 mi (8,723.23 km) |
| Portland to Castelsarrasin | 5,355.10 mi (8,618.21 km) |
| Portland to Castres | 5,413.32 mi (8,711.90 km) |
| Portland to Caudebec-les-Elbeuf | 5,063.59 mi (8,149.06 km) |
| Portland to Caudry | 5,080.97 mi (8,177.03 km) |
