| Apex to Clarkston (Georgia) | 331.92 mi (534.17 km) |
| Apex to Clarksville (Indiana) | 420.34 mi (676.47 km) |
| Apex to Clarksville (Tennessee) | 475.84 mi (765.80 km) |
| Apex to Clawson (Michigan) | 523.37 mi (842.29 km) |
| Apex to Clay (Alabama) | 460.98 mi (741.87 km) |
| Apex to Clayton (California) | 2,364.81 mi (3,805.79 km) |
| Apex to Clayton (Missouri) | 661.57 mi (1,064.70 km) |
| Apex to Clayton (North Carolina) | 24.24 mi (39.01 km) |
| Apex to Clayton (Ohio) | 413.03 mi (664.70 km) |
| Apex to Clearfield (Utah) | 1,821.21 mi (2,930.95 km) |
| Apex to Clearlake (California) | 2,391.08 mi (3,848.06 km) |
| Apex to Clearwater (Florida) | 581.58 mi (935.96 km) |
| Apex to Cleburne (Texas) | 1,084.94 mi (1,746.04 km) |
| Apex to Clemmons (North Carolina) | 87.27 mi (140.45 km) |
| Apex to Clemson (South Carolina) | 233.63 mi (376.00 km) |
