| Sofia to Clarkston (Georgia) | 5,449.37 mi (8,769.91 km) |
| Sofia to Clarksville (Indiana) | 5,292.03 mi (8,516.70 km) |
| Sofia to Clarksville (Tennessee) | 5,438.70 mi (8,752.74 km) |
| Sofia to Clawson (Michigan) | 4,992.02 mi (8,033.89 km) |
| Sofia to Clay (Alabama) | 5,551.33 mi (8,934.00 km) |
| Sofia to Clayton (California) | 6,453.36 mi (10,385.67 km) |
| Sofia to Clayton (Missouri) | 5,448.93 mi (8,769.21 km) |
| Sofia to Clayton (North Carolina) | 5,121.96 mi (8,243.00 km) |
| Sofia to Clayton (Ohio) | 5,162.33 mi (8,307.97 km) |
| Sofia to Clearfield (Utah) | 6,013.08 mi (9,677.12 km) |
| Sofia to Clearlake (California) | 6,405.16 mi (10,308.11 km) |
| Sofia to Clearwater (Florida) | 5,669.31 mi (9,123.86 km) |
| Sofia to Cleburne (Texas) | 6,037.91 mi (9,717.08 km) |
| Sofia to Clemmons (North Carolina) | 5,185.36 mi (8,345.03 km) |
| Sofia to Clemson (South Carolina) | 5,348.86 mi (8,608.17 km) |
