| Alpena to Carmona | 3,917.36 mi (6,304.38 km) |
| Alpena to Cartagena | 4,120.74 mi (6,631.68 km) |
| Alpena to Cartama | 3,992.50 mi (6,425.30 km) |
| Alpena to Cartaya | 3,855.54 mi (6,204.89 km) |
| Alpena to Caspe | 4,017.99 mi (6,466.33 km) |
| Alpena to Cassa de la Selva | 4,115.67 mi (6,623.52 km) |
| Alpena to Castalla | 4,094.42 mi (6,589.33 km) |
| Alpena to Castellbisbal | 4,094.40 mi (6,589.29 km) |
| Alpena to Castelldefels | 4,101.97 mi (6,601.48 km) |
| Alpena to Castello de Ampurias | 4,109.41 mi (6,613.45 km) |
| Alpena to Castellon de la Plana | 4,067.10 mi (6,545.36 km) |
| Alpena to Castilleja de la Cuesta | 3,901.71 mi (6,279.19 km) |
| Alpena to Catarroja | 4,073.95 mi (6,556.39 km) |
| Alpena to Catral | 4,106.04 mi (6,608.03 km) |
| Alpena to Caudete | 4,076.14 mi (6,559.92 km) |
