| Portland to Cavaillon | 5,480.02 mi (8,819.23 km) |
| Portland to Cebazat | 5,312.71 mi (8,549.98 km) |
| Portland to Cenon | 5,261.27 mi (8,467.19 km) |
| Portland to Cergy | 5,105.50 mi (8,216.51 km) |
| Portland to Cernay | 5,309.94 mi (8,545.52 km) |
| Portland to Cesson | 5,146.19 mi (8,281.99 km) |
| Portland to Cesson-Sevigne | 5,052.64 mi (8,131.43 km) |
| Portland to Cestas | 5,262.95 mi (8,469.91 km) |
| Portland to Chalette-sur-Loing | 5,180.70 mi (8,337.53 km) |
| Portland to Challans | 5,113.21 mi (8,228.92 km) |
| Portland to Chalon-sur-Saone | 5,307.45 mi (8,541.52 km) |
| Portland to Chalons-en-Champagne | 5,171.40 mi (8,322.56 km) |
| Portland to Chamalieres | 5,315.02 mi (8,553.70 km) |
| Portland to Chambery | 5,405.09 mi (8,698.65 km) |
| Portland to Chambly | 5,103.29 mi (8,212.95 km) |
