| Glenmont to Cordele (Georgia) | 619.68 mi (997.27 km) |
| Glenmont to Corinth (Mississippi) | 693.18 mi (1,115.57 km) |
| Glenmont to Corinth (Texas) | 1,187.20 mi (1,910.62 km) |
| Glenmont to Cornelius (North Carolina) | 325.86 mi (524.43 km) |
| Glenmont to Cornelius (Oregon) | 2,359.75 mi (3,797.65 km) |
| Glenmont to Corning (New York) | 212.61 mi (342.17 km) |
| Glenmont to Corona (California) | 2,261.09 mi (3,638.87 km) |
| Glenmont to Coronado (California) | 2,270.30 mi (3,653.70 km) |
| Glenmont to Corpus Christi (Texas) | 1,405.29 mi (2,261.60 km) |
| Glenmont to Corsicana (Texas) | 1,190.14 mi (1,915.35 km) |
| Glenmont to Cortland (New York) | 248.12 mi (399.32 km) |
| Glenmont to Corvallis (Oregon) | 2,378.26 mi (3,827.44 km) |
| Glenmont to Coshocton (Ohio) | 268.28 mi (431.75 km) |
| Glenmont to Costa Mesa (California) | 2,284.63 mi (3,676.76 km) |
| Glenmont to Coto de Caza (California) | 2,268.88 mi (3,651.41 km) |
