| Portland to Butzbach | 5,194.83 mi (8,360.26 km) |
| Portland to Buxtehude | 5,042.40 mi (8,114.96 km) |
| Portland to Cadolzburg | 5,304.75 mi (8,537.17 km) |
| Portland to Calbe | 5,180.63 mi (8,337.42 km) |
| Portland to Calw | 5,296.41 mi (8,523.75 km) |
| Portland to Castrop-Rauxel | 5,098.39 mi (8,205.07 km) |
| Portland to Celle | 5,100.49 mi (8,208.45 km) |
| Portland to Cham | 5,359.79 mi (8,625.74 km) |
| Portland to Chemnitz | 5,269.33 mi (8,480.17 km) |
| Portland to Clausthal-Zellerfeld | 5,154.16 mi (8,294.82 km) |
| Portland to Cloppenburg | 5,041.11 mi (8,112.89 km) |
| Portland to Coburg | 5,258.95 mi (8,463.45 km) |
| Portland to Coesfeld | 5,071.90 mi (8,162.44 km) |
| Portland to Cologne | 5,124.70 mi (8,247.41 km) |
| Portland to Coswig | 5,265.95 mi (8,474.73 km) |
