| Duffel to Clermont (Florida) | 4,554.96 mi (7,330.50 km) |
| Duffel to Cleveland (Mississippi) | 4,655.73 mi (7,492.68 km) |
| Duffel to Cleveland (Ohio) | 3,928.85 mi (6,322.87 km) |
| Duffel to Cleveland (Tennessee) | 4,353.33 mi (7,006.01 km) |
| Duffel to Cleveland Heights (Ohio) | 3,922.72 mi (6,313.01 km) |
| Duffel to Cliffside Park (New Jersey) | 3,653.83 mi (5,880.26 km) |
| Duffel to Clifton (Colorado) | 5,011.07 mi (8,064.54 km) |
| Duffel to Clifton (New Jersey) | 3,658.87 mi (5,888.39 km) |
| Duffel to Clinton (Iowa) | 4,234.80 mi (6,815.25 km) |
| Duffel to Clinton (Maryland) | 3,864.61 mi (6,219.49 km) |
| Duffel to Clinton (Mississippi) | 4,711.34 mi (7,582.17 km) |
| Duffel to Clinton (Utah) | 5,010.63 mi (8,063.84 km) |
| Duffel to Clive (Iowa) | 4,375.23 mi (7,041.25 km) |
| Duffel to Cloquet (Minnesota) | 4,081.02 mi (6,567.77 km) |
| Duffel to Cloverleaf (Texas) | 5,033.32 mi (8,100.35 km) |
