| Mountain Ash to Cookeville (Tennessee) | 4,000.76 mi (6,438.61 km) |
| Mountain Ash to Coolidge (Arizona) | 5,158.65 mi (8,302.05 km) |
| Mountain Ash to Coon Rapids (Minnesota) | 3,879.65 mi (6,243.69 km) |
| Mountain Ash to Cooper City (Florida) | 4,278.29 mi (6,885.24 km) |
| Mountain Ash to Coos Bay (Oregon) | 4,980.02 mi (8,014.57 km) |
| Mountain Ash to Copiague (New York) | 3,300.85 mi (5,312.20 km) |
| Mountain Ash to Coppell (Texas) | 4,614.62 mi (7,426.52 km) |
| Mountain Ash to Copperas Cove (Texas) | 4,745.58 mi (7,637.28 km) |
| Mountain Ash to Coral Gables (Florida) | 4,294.94 mi (6,912.03 km) |
| Mountain Ash to Coral Springs (Florida) | 4,265.86 mi (6,865.25 km) |
| Mountain Ash to Coral Terrace (Florida) | 4,294.20 mi (6,910.85 km) |
| Mountain Ash to Coralville (Iowa) | 3,977.49 mi (6,401.16 km) |
| Mountain Ash to Coram (New York) | 3,275.97 mi (5,272.16 km) |
| Mountain Ash to Corcoran (California) | 5,254.84 mi (8,456.85 km) |
| Mountain Ash to Cordele (Georgia) | 4,131.53 mi (6,649.05 km) |
