| SeaTac to Cehegin | 5,484.59 mi (8,826.59 km) |
| SeaTac to Cervello | 5,415.15 mi (8,714.84 km) |
| SeaTac to Cervera | 5,379.49 mi (8,657.45 km) |
| SeaTac to Ceuti | 5,502.27 mi (8,855.05 km) |
| SeaTac to Cheste | 5,442.62 mi (8,759.05 km) |
| SeaTac to Chiclana de la Frontera | 5,431.56 mi (8,741.25 km) |
| SeaTac to Chipiona | 5,404.65 mi (8,697.95 km) |
| SeaTac to Chiva | 5,441.98 mi (8,758.02 km) |
| SeaTac to Churriana de la Vega | 5,476.12 mi (8,812.96 km) |
| SeaTac to Ciempozuelos | 5,311.86 mi (8,548.61 km) |
| SeaTac to Cieza | 5,488.63 mi (8,833.09 km) |
| SeaTac to Cisterniga | 5,198.23 mi (8,365.74 km) |
| SeaTac to Ciudad de Melilla | 5,602.82 mi (9,016.86 km) |
| SeaTac to Ciudad Real | 5,366.61 mi (8,636.73 km) |
| SeaTac to Ciudad-Rodrigo | 5,192.85 mi (8,357.08 km) |
