| Sofia to Cicero (Illinois) | 5,195.95 mi (8,362.08 km) |
| Sofia to Cimarron Hills (Colorado) | 5,929.42 mi (9,542.47 km) |
| Sofia to Cincinnati (Ohio) | 5,203.81 mi (8,374.72 km) |
| Sofia to Cinco Ranch (Texas) | 6,114.84 mi (9,840.88 km) |
| Sofia to Circleville (Ohio) | 5,120.62 mi (8,240.84 km) |
| Sofia to Citrus (California) | 6,590.86 mi (10,606.96 km) |
| Sofia to Citrus Heights (California) | 6,391.40 mi (10,285.97 km) |
| Sofia to Citrus Park (Florida) | 5,656.07 mi (9,102.57 km) |
| Sofia to Claiborne (Louisiana) | 5,830.80 mi (9,383.77 km) |
| Sofia to Claremont (California) | 6,585.65 mi (10,598.58 km) |
| Sofia to Claremont (New Hampshire) | 4,532.84 mi (7,294.91 km) |
| Sofia to Claremore (Oklahoma) | 5,761.84 mi (9,272.79 km) |
| Sofia to Clarksburg (Maryland) | 4,911.54 mi (7,904.36 km) |
| Sofia to Clarksburg (West Virginia) | 5,032.34 mi (8,098.78 km) |
| Sofia to Clarksdale (Mississippi) | 5,682.95 mi (9,145.82 km) |
