| Glenmont to Cullman (Alabama) | 639.13 mi (1,028.58 km) |
| Glenmont to Culpeper (Virginia) | 65.98 mi (106.18 km) |
| Glenmont to Culver City (California) | 2,302.03 mi (3,704.76 km) |
| Glenmont to Cumberland (Maryland) | 99.88 mi (160.74 km) |
| Glenmont to Cupertino (California) | 2,421.48 mi (3,897.00 km) |
| Glenmont to Cutler Bay (Florida) | 951.67 mi (1,531.56 km) |
| Glenmont to Cutlerville (Michigan) | 519.71 mi (836.39 km) |
| Glenmont to Cuyahoga Falls (Ohio) | 277.11 mi (445.97 km) |
| Glenmont to Cypress (California) | 2,287.55 mi (3,681.46 km) |
| Glenmont to Cypress Gardens (Florida) | 809.61 mi (1,302.94 km) |
| Glenmont to Cypress Lake (Florida) | 910.10 mi (1,464.67 km) |
| Glenmont to D'Iberville (Mississippi) | 896.13 mi (1,442.19 km) |
| Glenmont to Dakota Ridge (Colorado) | 1,495.16 mi (2,406.23 km) |
| Glenmont to Dale City (Virginia) | 33.34 mi (53.65 km) |
| Glenmont to Dallas (Georgia) | 560.25 mi (901.63 km) |
