| Southborough to Crest Hill (Illinois) | 4,006.41 mi (6,447.70 km) |
| Southborough to Crestview (Florida) | 4,467.98 mi (7,190.53 km) |
| Southborough to Crestwood (Illinois) | 3,988.76 mi (6,419.30 km) |
| Southborough to Crestwood (Missouri) | 4,236.55 mi (6,818.07 km) |
| Southborough to Creve Coeur (Missouri) | 4,233.97 mi (6,813.92 km) |
| Southborough to Crofton (Maryland) | 3,668.96 mi (5,904.62 km) |
| Southborough to Crossville (Tennessee) | 4,150.40 mi (6,679.43 km) |
| Southborough to Crowley (Louisiana) | 4,730.59 mi (7,613.15 km) |
| Southborough to Crowley (Texas) | 4,805.88 mi (7,734.31 km) |
| Southborough to Crown Point (Indiana) | 3,984.37 mi (6,412.22 km) |
| Southborough to Crystal (Minnesota) | 4,039.14 mi (6,500.37 km) |
| Southborough to Crystal Lake (Illinois) | 3,984.21 mi (6,411.97 km) |
| Southborough to Cudahy (California) | 5,472.30 mi (8,806.81 km) |
| Southborough to Cudahy (Wisconsin) | 3,933.48 mi (6,330.33 km) |
| Southborough to Cullman (Alabama) | 4,309.40 mi (6,935.31 km) |
