| SeaTac to Cognac | 5,107.09 mi (8,219.07 km) |
| SeaTac to Cogolin | 5,437.83 mi (8,751.35 km) |
| SeaTac to Colmar | 5,178.02 mi (8,333.22 km) |
| SeaTac to Colombes | 4,998.62 mi (8,044.51 km) |
| SeaTac to Colomiers | 5,271.57 mi (8,483.77 km) |
| SeaTac to Combs-la-Ville | 5,021.03 mi (8,080.56 km) |
| SeaTac to Comines | 4,915.21 mi (7,910.27 km) |
| SeaTac to Compiegne | 4,986.07 mi (8,024.31 km) |
| SeaTac to Concarneau | 4,884.01 mi (7,860.05 km) |
| SeaTac to Conde-sur-l'Escaut | 4,947.59 mi (7,962.38 km) |
| SeaTac to Conflans-Sainte-Honorine | 4,990.30 mi (8,031.12 km) |
| SeaTac to Corbas | 5,254.18 mi (8,455.79 km) |
| SeaTac to Corbeil-Essonnes | 5,022.11 mi (8,082.30 km) |
| SeaTac to Cormeilles-en-Parisis | 4,994.46 mi (8,037.80 km) |
| SeaTac to Cosne sur Loire | 5,101.79 mi (8,210.53 km) |
