| Mason City to Cockermouth | 3,869.76 mi (6,227.78 km) |
| Mason City to Colchester | 4,118.55 mi (6,628.17 km) |
| Mason City to Coleford | 3,994.04 mi (6,427.79 km) |
| Mason City to Colne | 3,938.62 mi (6,338.60 km) |
| Mason City to Colwyn Bay | 3,903.16 mi (6,281.52 km) |
| Mason City to Congleton | 3,960.92 mi (6,374.49 km) |
| Mason City to Conisbrough | 3,985.25 mi (6,413.65 km) |
| Mason City to Connahs Quay | 3,928.79 mi (6,322.78 km) |
| Mason City to Consett | 3,917.02 mi (6,303.83 km) |
| Mason City to Conwy | 3,898.79 mi (6,274.50 km) |
| Mason City to Cookstown | 3,750.06 mi (6,035.14 km) |
| Mason City to Corby | 4,039.10 mi (6,500.30 km) |
| Mason City to Corfe Mullen | 4,052.46 mi (6,521.81 km) |
| Mason City to Corsham | 4,022.53 mi (6,473.64 km) |
| Mason City to Coseley | 3,986.99 mi (6,416.44 km) |
