| Opelika to Cortona | 5,047.93 mi (8,123.86 km) |
| Opelika to Cosenza | 5,378.72 mi (8,656.21 km) |
| Opelika to Cossato | 4,807.37 mi (7,736.72 km) |
| Opelika to Costa Volpino | 4,882.37 mi (7,857.42 km) |
| Opelika to Creazzo | 4,951.05 mi (7,967.94 km) |
| Opelika to Crema | 4,879.21 mi (7,852.33 km) |
| Opelika to Cremona | 4,901.75 mi (7,888.60 km) |
| Opelika to Crevalcore | 4,963.49 mi (7,987.97 km) |
| Opelika to Crispiano | 5,374.13 mi (8,648.83 km) |
| Opelika to Crosia | 5,392.02 mi (8,677.62 km) |
| Opelika to Crotone | 5,425.86 mi (8,732.07 km) |
| Opelika to Cuneo | 4,816.57 mi (7,751.53 km) |
| Opelika to Cuorgne | 4,790.29 mi (7,709.22 km) |
| Opelika to Cusano Milanino | 4,851.87 mi (7,808.33 km) |
| Opelika to Cutro | 5,421.71 mi (8,725.40 km) |
