| Alpena to Cernavoda | 4,970.93 mi (7,999.93 km) |
| Alpena to Chitila | 4,891.82 mi (7,872.62 km) |
| Alpena to Cisnadie | 4,769.81 mi (7,676.26 km) |
| Alpena to Cluj-Napoca | 4,699.97 mi (7,563.87 km) |
| Alpena to Codlea | 4,815.29 mi (7,749.46 km) |
| Alpena to Comanesti | 4,813.91 mi (7,747.25 km) |
| Alpena to Comarnic | 4,843.54 mi (7,794.93 km) |
| Alpena to Constanta | 4,999.96 mi (8,046.65 km) |
| Alpena to Corabia | 4,875.65 mi (7,846.60 km) |
| Alpena to Costesti | 4,845.51 mi (7,798.09 km) |
| Alpena to Covasna | 4,833.26 mi (7,778.38 km) |
| Alpena to Craiova | 4,824.24 mi (7,763.87 km) |
| Alpena to Cristuru Secuiesc | 4,772.53 mi (7,680.65 km) |
| Alpena to Cugir | 4,736.12 mi (7,622.05 km) |
| Alpena to Cumpana | 5,000.02 mi (8,046.76 km) |
