| Mountain Ash to Carson (California) | 5,339.35 mi (8,592.85 km) |
| Mountain Ash to Carson City (Nevada) | 5,087.50 mi (8,187.54 km) |
| Mountain Ash to Carteret (New Jersey) | 3,338.96 mi (5,373.54 km) |
| Mountain Ash to Cartersville (Georgia) | 4,066.89 mi (6,545.03 km) |
| Mountain Ash to Carthage (Missouri) | 4,300.79 mi (6,921.45 km) |
| Mountain Ash to Cary (Illinois) | 3,826.02 mi (6,157.39 km) |
| Mountain Ash to Cary (North Carolina) | 3,743.72 mi (6,024.93 km) |
| Mountain Ash to Casa de Oro-Mount Helix (California) | 5,356.74 mi (8,620.84 km) |
| Mountain Ash to Casa Grande (Arizona) | 5,168.65 mi (8,318.14 km) |
| Mountain Ash to Casas Adobes (Arizona) | 5,172.83 mi (8,324.87 km) |
| Mountain Ash to Cascades (Virginia) | 3,536.04 mi (5,690.70 km) |
| Mountain Ash to Casper (Wyoming) | 4,451.40 mi (7,163.84 km) |
| Mountain Ash to Casselberry (Florida) | 4,191.30 mi (6,745.24 km) |
| Mountain Ash to Castaic (California) | 5,315.33 mi (8,554.20 km) |
| Mountain Ash to Castle Pines (Colorado) | 4,575.08 mi (7,362.89 km) |
