| Duluth to Chivasso | 4,445.88 mi (7,154.94 km) |
| Duluth to Ciampino | 4,778.35 mi (7,690.01 km) |
| Duluth to Cicciano | 4,889.70 mi (7,869.21 km) |
| Duluth to Cingoli | 4,724.33 mi (7,603.08 km) |
| Duluth to Cinisello Balsamo | 4,477.42 mi (7,205.71 km) |
| Duluth to Cinisi | 4,975.80 mi (8,007.78 km) |
| Duluth to Cirie | 4,433.39 mi (7,134.85 km) |
| Duluth to Ciro Marina | 5,063.92 mi (8,149.59 km) |
| Duluth to Cislago | 4,463.81 mi (7,183.81 km) |
| Duluth to Cisterna di Latina | 4,796.90 mi (7,719.86 km) |
| Duluth to Cisternino | 5,005.39 mi (8,055.39 km) |
| Duluth to Citta di Castello | 4,684.94 mi (7,539.68 km) |
| Duluth to Citta Sant'Angelo | 4,795.67 mi (7,717.89 km) |
| Duluth to Cittadella | 4,563.90 mi (7,344.88 km) |
| Duluth to Cittanova | 5,077.74 mi (8,171.84 km) |
