| Glenmont to Cloverleaf (Texas) | 1,212.36 mi (1,951.11 km) |
| Glenmont to Cloverly (Maryland) | 3.58 mi (5.76 km) |
| Glenmont to Clovis (California) | 2,306.86 mi (3,712.53 km) |
| Glenmont to Clovis (New Mexico) | 1,476.87 mi (2,376.79 km) |
| Glenmont to Clute (Texas) | 1,255.23 mi (2,020.10 km) |
| Glenmont to Coachella (California) | 2,189.20 mi (3,523.17 km) |
| Glenmont to Coalinga (California) | 2,355.20 mi (3,790.33 km) |
| Glenmont to Coamo (Puerto Rico) | 1,585.84 mi (2,552.17 km) |
| Glenmont to Coatesville (Pennsylvania) | 90.95 mi (146.36 km) |
| Glenmont to Cockeysville (Maryland) | 36.10 mi (58.09 km) |
| Glenmont to Cocoa (Florida) | 768.58 mi (1,236.91 km) |
| Glenmont to Cocoa Beach (Florida) | 769.69 mi (1,238.70 km) |
| Glenmont to Coconut Creek (Florida) | 902.14 mi (1,451.85 km) |
| Glenmont to Coeur d'Alene (Idaho) | 2,057.82 mi (3,311.74 km) |
| Glenmont to Cohoes (New York) | 309.55 mi (498.18 km) |
