| Duluth to Cassina de' Pecchi | 4,484.35 mi (7,216.86 km) |
| Duluth to Cassino | 4,837.92 mi (7,785.88 km) |
| Duluth to Castagneto Carducci | 4,639.46 mi (7,466.50 km) |
| Duluth to Castano Primo | 4,461.23 mi (7,179.66 km) |
| Duluth to Castel Bolognese | 4,627.96 mi (7,447.98 km) |
| Duluth to Castel Gandolfo | 4,782.83 mi (7,697.23 km) |
| Duluth to Castel Goffredo | 4,534.19 mi (7,297.07 km) |
| Duluth to Castel Maggiore | 4,600.57 mi (7,403.90 km) |
| Duluth to Castel Mella | 4,513.14 mi (7,263.20 km) |
| Duluth to Castel San Giorgio | 4,904.86 mi (7,893.62 km) |
| Duluth to Castel San Giovanni | 4,508.43 mi (7,255.62 km) |
| Duluth to Castel San Pietro Terme | 4,616.24 mi (7,429.13 km) |
| Duluth to Castel Volturno | 4,863.17 mi (7,826.51 km) |
| Duluth to Castelbuono | 5,025.08 mi (8,087.09 km) |
| Duluth to Casteldaccia | 4,997.95 mi (8,043.42 km) |
