| Southborough to Cedar Rapids (Iowa) | 4,122.57 mi (6,634.64 km) |
| Southborough to Cedarburg (Wisconsin) | 3,922.05 mi (6,311.93 km) |
| Southborough to Celebration (Florida) | 4,379.52 mi (7,048.15 km) |
| Southborough to Celina (Ohio) | 3,915.91 mi (6,302.04 km) |
| Southborough to Celina (Texas) | 4,746.08 mi (7,638.08 km) |
| Southborough to Centennial (Colorado) | 4,716.93 mi (7,591.16 km) |
| Southborough to Center Point (Alabama) | 4,329.17 mi (6,967.13 km) |
| Southborough to Centereach (New York) | 3,440.33 mi (5,536.67 km) |
| Southborough to Centerton (Arkansas) | 4,495.67 mi (7,235.09 km) |
| Southborough to Centerville (Ohio) | 3,941.85 mi (6,343.80 km) |
| Southborough to Centerville (Utah) | 4,880.26 mi (7,854.03 km) |
| Southborough to Central (Louisiana) | 4,659.26 mi (7,498.35 km) |
| Southborough to Central Falls (Rhode Island) | 3,327.89 mi (5,355.71 km) |
| Southborough to Central Islip (New York) | 3,448.56 mi (5,549.91 km) |
| Southborough to Central Point (Oregon) | 5,130.13 mi (8,256.15 km) |
