| SeaTac to Clemson (South Carolina) | 2,208.51 mi (3,554.25 km) |
| SeaTac to Clermont (Florida) | 2,526.70 mi (4,066.34 km) |
| SeaTac to Cleveland (Mississippi) | 1,888.83 mi (3,039.78 km) |
| SeaTac to Cleveland (Ohio) | 2,020.97 mi (3,252.44 km) |
| SeaTac to Cleveland (Tennessee) | 2,093.65 mi (3,369.40 km) |
| SeaTac to Cleveland Heights (Ohio) | 2,025.38 mi (3,259.53 km) |
| SeaTac to Cliffside Park (New Jersey) | 2,399.06 mi (3,860.91 km) |
| SeaTac to Clifton (Colorado) | 902.69 mi (1,452.73 km) |
| SeaTac to Clifton (New Jersey) | 2,389.89 mi (3,846.16 km) |
| SeaTac to Clinton (Iowa) | 1,610.33 mi (2,591.58 km) |
| SeaTac to Clinton (Maryland) | 2,331.95 mi (3,752.91 km) |
| SeaTac to Clinton (Mississippi) | 1,968.27 mi (3,167.63 km) |
| SeaTac to Clinton (Utah) | 666.76 mi (1,073.04 km) |
| SeaTac to Clive (Iowa) | 1,451.27 mi (2,335.59 km) |
| SeaTac to Cloquet (Minnesota) | 1,394.61 mi (2,244.40 km) |
