| Alpena to Cortona | 4,429.27 mi (7,128.21 km) |
| Alpena to Cosenza | 4,775.52 mi (7,685.45 km) |
| Alpena to Cossato | 4,183.39 mi (6,732.52 km) |
| Alpena to Costa Volpino | 4,247.82 mi (6,836.21 km) |
| Alpena to Creazzo | 4,313.52 mi (6,941.94 km) |
| Alpena to Crema | 4,250.83 mi (6,841.05 km) |
| Alpena to Cremona | 4,274.12 mi (6,878.54 km) |
| Alpena to Crevalcore | 4,335.02 mi (6,976.55 km) |
| Alpena to Crispiano | 4,754.35 mi (7,651.39 km) |
| Alpena to Crosia | 4,783.73 mi (7,698.67 km) |
| Alpena to Crotone | 4,820.01 mi (7,757.05 km) |
| Alpena to Cuneo | 4,207.01 mi (6,770.53 km) |
| Alpena to Cuorgne | 4,170.22 mi (6,711.32 km) |
| Alpena to Cusano Milanino | 4,223.82 mi (6,797.58 km) |
| Alpena to Cutro | 4,817.02 mi (7,752.25 km) |
