| Security-Widefield to Clacton-on-Sea | 4,760.55 mi (7,661.37 km) |
| Security-Widefield to Clay Cross | 4,617.89 mi (7,431.78 km) |
| Security-Widefield to Clayton | 4,580.29 mi (7,371.26 km) |
| Security-Widefield to Clayton le Moors | 4,561.17 mi (7,340.50 km) |
| Security-Widefield to Cleckheaton | 4,585.69 mi (7,379.95 km) |
| Security-Widefield to Cleethorpes | 4,649.69 mi (7,482.95 km) |
| Security-Widefield to Clevedon | 4,634.54 mi (7,458.56 km) |
| Security-Widefield to Clifton | 4,636.13 mi (7,461.12 km) |
| Security-Widefield to Clifton | 4,597.07 mi (7,398.27 km) |
| Security-Widefield to Cliftonville | 4,786.11 mi (7,702.50 km) |
| Security-Widefield to Clitheroe | 4,557.25 mi (7,334.19 km) |
| Security-Widefield to Clydebank | 4,414.77 mi (7,104.88 km) |
| Security-Widefield to Coalville | 4,636.58 mi (7,461.86 km) |
| Security-Widefield to Coatbridge | 4,428.48 mi (7,126.94 km) |
| Security-Widefield to Cobham | 4,725.38 mi (7,604.76 km) |
