| Duluth to Clacton-on-Sea | 3,921.02 mi (6,310.28 km) |
| Duluth to Clay Cross | 3,778.75 mi (6,081.32 km) |
| Duluth to Clayton | 3,741.83 mi (6,021.90 km) |
| Duluth to Clayton le Moors | 3,722.38 mi (5,990.59 km) |
| Duluth to Cleckheaton | 3,747.20 mi (6,030.54 km) |
| Duluth to Cleethorpes | 3,811.99 mi (6,134.81 km) |
| Duluth to Clevedon | 3,792.75 mi (6,103.84 km) |
| Duluth to Clifton | 3,796.76 mi (6,110.29 km) |
| Duluth to Clifton | 3,759.36 mi (6,050.11 km) |
| Duluth to Cliftonville | 3,946.22 mi (6,350.83 km) |
| Duluth to Clitheroe | 3,718.60 mi (5,984.50 km) |
| Duluth to Clydebank | 3,578.39 mi (5,758.86 km) |
| Duluth to Coalville | 3,796.87 mi (6,110.47 km) |
| Duluth to Coatbridge | 3,592.26 mi (5,781.19 km) |
| Duluth to Cobham | 3,884.49 mi (6,251.49 km) |
