| South Portland to Butzbach | 3,569.54 mi (5,744.62 km) |
| South Portland to Buxtehude | 3,523.47 mi (5,670.48 km) |
| South Portland to Cadolzburg | 3,687.53 mi (5,934.51 km) |
| South Portland to Calbe | 3,647.79 mi (5,870.56 km) |
| South Portland to Calw | 3,623.97 mi (5,832.22 km) |
| South Portland to Castrop-Rauxel | 3,484.56 mi (5,607.86 km) |
| South Portland to Celle | 3,561.79 mi (5,732.15 km) |
| South Portland to Cham | 3,766.18 mi (6,061.09 km) |
| South Portland to Chemnitz | 3,724.84 mi (5,994.55 km) |
| South Portland to Clausthal-Zellerfeld | 3,595.21 mi (5,785.94 km) |
| South Portland to Cloppenburg | 3,477.68 mi (5,596.79 km) |
| South Portland to Coburg | 3,666.13 mi (5,900.07 km) |
| South Portland to Coesfeld | 3,467.74 mi (5,580.78 km) |
| South Portland to Cologne | 3,487.14 mi (5,612.00 km) |
| South Portland to Coswig | 3,741.10 mi (6,020.72 km) |
