| Opelika to Cividale del Friuli | 5,014.47 mi (8,070.02 km) |
| Opelika to Civita Castellana | 5,099.85 mi (8,207.41 km) |
| Opelika to Civitanova Marche | 5,123.33 mi (8,245.20 km) |
| Opelika to Civitavecchia | 5,079.37 mi (8,174.46 km) |
| Opelika to Civitella in Val di Chiana | 5,031.28 mi (8,097.06 km) |
| Opelika to Clusone | 4,874.32 mi (7,844.46 km) |
| Opelika to Coccaglio | 4,885.68 mi (7,862.74 km) |
| Opelika to Codigoro | 5,001.27 mi (8,048.77 km) |
| Opelika to Codogno | 4,886.70 mi (7,864.38 km) |
| Opelika to Codroipo | 5,000.09 mi (8,046.87 km) |
| Opelika to Cogoleto | 4,864.77 mi (7,829.08 km) |
| Opelika to Colle di Val d'Elsa | 5,006.18 mi (8,056.68 km) |
| Opelika to Colle Salvetti | 4,970.96 mi (7,999.99 km) |
| Opelika to Collecchio | 4,921.98 mi (7,921.16 km) |
| Opelika to Colleferro | 5,146.25 mi (8,282.08 km) |
