| Duluth to Castelletto sopra Ticino | 4,448.75 mi (7,159.57 km) |
| Duluth to Castelli Calepio | 4,498.00 mi (7,238.84 km) |
| Duluth to Castelnovo ne' Monti | 4,572.19 mi (7,358.23 km) |
| Duluth to Castelnuovo Berardenga | 4,663.72 mi (7,505.54 km) |
| Duluth to Castelnuovo di Porto | 4,758.48 mi (7,658.03 km) |
| Duluth to Castelnuovo di Verona | 4,538.22 mi (7,303.56 km) |
| Duluth to Castelnuovo Rangone | 4,585.85 mi (7,380.22 km) |
| Duluth to Castelvetrano | 4,988.20 mi (8,027.73 km) |
| Duluth to Castelvetro di Modena | 4,588.82 mi (7,384.99 km) |
| Duluth to Castenaso | 4,606.99 mi (7,414.24 km) |
| Duluth to Castenedolo | 4,519.76 mi (7,273.85 km) |
| Duluth to Castiglion Fiorentino | 4,678.87 mi (7,529.91 km) |
| Duluth to Castiglione del Lago | 4,693.41 mi (7,553.31 km) |
| Duluth to Castiglione delle Stiviere | 4,530.30 mi (7,290.81 km) |
| Duluth to Castrolibero | 5,033.00 mi (8,099.83 km) |
