| Security-Widefield to Cockermouth | 4,494.69 mi (7,233.50 km) |
| Security-Widefield to Colchester | 4,748.12 mi (7,641.36 km) |
| Security-Widefield to Coleford | 4,629.33 mi (7,450.19 km) |
| Security-Widefield to Colne | 4,565.19 mi (7,346.96 km) |
| Security-Widefield to Colwyn Bay | 4,534.26 mi (7,297.18 km) |
| Security-Widefield to Congleton | 4,590.37 mi (7,387.49 km) |
| Security-Widefield to Conisbrough | 4,611.92 mi (7,422.18 km) |
| Security-Widefield to Connahs Quay | 4,559.25 mi (7,337.40 km) |
| Security-Widefield to Consett | 4,538.82 mi (7,304.53 km) |
| Security-Widefield to Conwy | 4,530.11 mi (7,290.51 km) |
| Security-Widefield to Cookstown | 4,379.76 mi (7,048.54 km) |
| Security-Widefield to Corby | 4,668.90 mi (7,513.88 km) |
| Security-Widefield to Corfe Mullen | 4,690.56 mi (7,548.72 km) |
| Security-Widefield to Corsham | 4,658.51 mi (7,497.15 km) |
| Security-Widefield to Coseley | 4,618.64 mi (7,432.99 km) |
