| Glenmont to Clarksdale (Mississippi) | 820.89 mi (1,321.10 km) |
| Glenmont to Clarkston (Georgia) | 539.90 mi (868.89 km) |
| Glenmont to Clarksville (Indiana) | 472.91 mi (761.07 km) |
| Glenmont to Clarksville (Tennessee) | 587.45 mi (945.41 km) |
| Glenmont to Clawson (Michigan) | 398.93 mi (642.01 km) |
| Glenmont to Clay (Alabama) | 648.11 mi (1,043.04 km) |
| Glenmont to Clayton (California) | 2,403.05 mi (3,867.34 km) |
| Glenmont to Clayton (Missouri) | 714.68 mi (1,150.16 km) |
| Glenmont to Clayton (North Carolina) | 247.93 mi (399.00 km) |
| Glenmont to Clayton (Ohio) | 392.22 mi (631.22 km) |
| Glenmont to Clearfield (Utah) | 1,841.86 mi (2,964.18 km) |
| Glenmont to Clearlake (California) | 2,420.80 mi (3,895.90 km) |
| Glenmont to Clearwater (Florida) | 833.54 mi (1,341.45 km) |
| Glenmont to Cleburne (Texas) | 1,229.75 mi (1,979.10 km) |
| Glenmont to Clemmons (North Carolina) | 278.38 mi (448.01 km) |
