| SeaTac to Clacton-on-Sea | 4,810.16 mi (7,741.20 km) |
| SeaTac to Clay Cross | 4,669.21 mi (7,514.37 km) |
| SeaTac to Clayton | 4,625.67 mi (7,444.29 km) |
| SeaTac to Clayton le Moors | 4,611.23 mi (7,421.06 km) |
| SeaTac to Cleckheaton | 4,631.16 mi (7,453.13 km) |
| SeaTac to Cleethorpes | 4,683.88 mi (7,537.98 km) |
| SeaTac to Clevedon | 4,723.33 mi (7,601.47 km) |
| SeaTac to Clifton | 4,689.34 mi (7,546.76 km) |
| SeaTac to Clifton | 4,633.86 mi (7,457.48 km) |
| SeaTac to Cliftonville | 4,839.14 mi (7,787.84 km) |
| SeaTac to Clitheroe | 4,605.92 mi (7,412.52 km) |
| SeaTac to Clydebank | 4,447.56 mi (7,157.65 km) |
| SeaTac to Coalville | 4,694.03 mi (7,554.31 km) |
| SeaTac to Coatbridge | 4,459.07 mi (7,176.18 km) |
| SeaTac to Cobham | 4,794.96 mi (7,716.75 km) |
