| SeaTac to Cadiz | 5,420.07 mi (8,722.76 km) |
| SeaTac to Calafell | 5,414.68 mi (8,714.08 km) |
| SeaTac to Calahorra | 5,246.11 mi (8,442.80 km) |
| SeaTac to Calasparra | 5,480.08 mi (8,819.34 km) |
| SeaTac to Calatayud | 5,308.94 mi (8,543.91 km) |
| SeaTac to Caldas de Montbuy | 5,407.87 mi (8,703.13 km) |
| SeaTac to Caldas de Reyes | 5,016.95 mi (8,074.01 km) |
| SeaTac to Calella | 5,423.33 mi (8,728.01 km) |
| SeaTac to Callosa de Segura | 5,512.38 mi (8,871.32 km) |
| SeaTac to Calpe | 5,512.26 mi (8,871.13 km) |
| SeaTac to Calvia | 5,535.62 mi (8,908.71 km) |
| SeaTac to Camas | 5,382.13 mi (8,661.71 km) |
| SeaTac to Cambados | 5,017.01 mi (8,074.10 km) |
| SeaTac to Cambre | 4,991.22 mi (8,032.60 km) |
| SeaTac to Cambrils | 5,406.87 mi (8,701.51 km) |
