| Southborough to Camas (Washington) | 4,931.08 mi (7,935.80 km) |
| Southborough to Cambridge (Maryland) | 3,664.90 mi (5,898.09 km) |
| Southborough to Cambridge (Massachusetts) | 3,296.51 mi (5,305.23 km) |
| Southborough to Camden (Arkansas) | 4,579.38 mi (7,369.80 km) |
| Southborough to Camden (New Jersey) | 3,563.75 mi (5,735.30 km) |
| Southborough to Cameron Park (California) | 5,288.67 mi (8,511.30 km) |
| Southborough to Camp Pendleton South (California) | 5,488.38 mi (8,832.70 km) |
| Southborough to Camp Springs (Maryland) | 3,688.15 mi (5,935.50 km) |
| Southborough to Camp Verde (Arizona) | 5,228.41 mi (8,414.31 km) |
| Southborough to Campbell (California) | 5,398.08 mi (8,687.37 km) |
| Southborough to Campbellsville (Kentucky) | 4,097.00 mi (6,593.48 km) |
| Southborough to Campton Hills (Illinois) | 4,000.46 mi (6,438.12 km) |
| Southborough to Canby (Oregon) | 4,957.24 mi (7,977.91 km) |
| Southborough to Candelaria (Puerto Rico) | 4,221.24 mi (6,793.43 km) |
| Southborough to Candler-McAfee (Georgia) | 4,226.84 mi (6,802.45 km) |
