| Mountain Ash to Caguas (Puerto Rico) | 4,072.36 mi (6,553.83 km) |
| Mountain Ash to Cahokia (Illinois) | 4,071.29 mi (6,552.10 km) |
| Mountain Ash to Calabasas (California) | 5,336.02 mi (8,587.49 km) |
| Mountain Ash to Caldwell (Idaho) | 4,742.77 mi (7,632.74 km) |
| Mountain Ash to Caledonia (Wisconsin) | 3,785.08 mi (6,091.49 km) |
| Mountain Ash to Calera (Alabama) | 4,196.88 mi (6,754.22 km) |
| Mountain Ash to Calexico (California) | 5,310.95 mi (8,547.15 km) |
| Mountain Ash to Calhoun (Georgia) | 4,056.79 mi (6,528.78 km) |
| Mountain Ash to California (Maryland) | 3,532.72 mi (5,685.36 km) |
| Mountain Ash to California City (California) | 5,252.31 mi (8,452.78 km) |
| Mountain Ash to Callaway (Florida) | 4,295.44 mi (6,912.85 km) |
| Mountain Ash to Calumet City (Illinois) | 3,826.47 mi (6,158.11 km) |
| Mountain Ash to Calverton (Maryland) | 3,517.51 mi (5,660.89 km) |
| Mountain Ash to Camano (Washington) | 4,659.14 mi (7,498.17 km) |
| Mountain Ash to Camarillo (California) | 5,343.09 mi (8,598.87 km) |
