| SeaTac to Castrovillari | 5,890.90 mi (9,480.49 km) |
| SeaTac to Catania | 6,006.33 mi (9,666.25 km) |
| SeaTac to Catanzaro | 5,957.10 mi (9,587.03 km) |
| SeaTac to Cattolica | 5,554.15 mi (8,938.55 km) |
| SeaTac to Cava de' Tirreni | 5,800.48 mi (9,334.98 km) |
| SeaTac to Cavallino | 5,906.49 mi (9,505.58 km) |
| SeaTac to Cavarzere | 5,467.93 mi (8,799.78 km) |
| SeaTac to Cave | 5,689.14 mi (9,155.79 km) |
| SeaTac to Cavriago | 5,456.31 mi (8,781.08 km) |
| SeaTac to Cavriglia | 5,550.68 mi (8,932.95 km) |
| SeaTac to Cazzago San Martino | 5,391.27 mi (8,676.42 km) |
| SeaTac to Ceccano | 5,714.19 mi (9,196.10 km) |
| SeaTac to Cecina | 5,538.42 mi (8,913.23 km) |
| SeaTac to Cefalu | 5,946.50 mi (9,569.97 km) |
| SeaTac to Ceglie Messapico | 5,869.75 mi (9,446.46 km) |
