| SeaTac to Cernavoda | 5,843.67 mi (9,404.49 km) |
| SeaTac to Chitila | 5,797.52 mi (9,330.21 km) |
| SeaTac to Cisnadie | 5,687.32 mi (9,152.86 km) |
| SeaTac to Cluj-Napoca | 5,609.66 mi (9,027.88 km) |
| SeaTac to Codlea | 5,711.46 mi (9,191.71 km) |
| SeaTac to Comanesti | 5,681.52 mi (9,143.53 km) |
| SeaTac to Comarnic | 5,743.53 mi (9,243.32 km) |
| SeaTac to Constanta | 5,864.73 mi (9,438.36 km) |
| SeaTac to Corabia | 5,818.03 mi (9,363.21 km) |
| SeaTac to Costesti | 5,767.43 mi (9,281.79 km) |
| SeaTac to Covasna | 5,714.51 mi (9,196.62 km) |
| SeaTac to Craiova | 5,769.38 mi (9,284.91 km) |
| SeaTac to Cristuru Secuiesc | 5,666.04 mi (9,118.60 km) |
| SeaTac to Cugir | 5,664.50 mi (9,116.14 km) |
| SeaTac to Cumpana | 5,866.97 mi (9,441.98 km) |
