| San Juan to Carrollwood (Florida) | 1,237.58 mi (1,991.69 km) |
| San Juan to Carson (California) | 3,370.76 mi (5,424.72 km) |
| San Juan to Carson City (Nevada) | 3,494.52 mi (5,623.89 km) |
| San Juan to Carteret (New Jersey) | 1,607.82 mi (2,587.54 km) |
| San Juan to Cartersville (Georgia) | 1,586.59 mi (2,553.36 km) |
| San Juan to Carthage (Missouri) | 2,144.99 mi (3,452.02 km) |
| San Juan to Cary (Illinois) | 2,098.08 mi (3,376.54 km) |
| San Juan to Cary (North Carolina) | 1,431.61 mi (2,303.96 km) |
| San Juan to Casa de Oro-Mount Helix (California) | 3,290.70 mi (5,295.87 km) |
| San Juan to Casa Grande (Arizona) | 2,991.34 mi (4,814.09 km) |
| San Juan to Casas Adobes (Arizona) | 2,942.67 mi (4,735.77 km) |
| San Juan to Cascades (Virginia) | 1,579.92 mi (2,542.64 km) |
| San Juan to Casper (Wyoming) | 2,887.59 mi (4,647.13 km) |
| San Juan to Casselberry (Florida) | 1,196.95 mi (1,926.30 km) |
| San Juan to Castaic (California) | 3,395.94 mi (5,465.24 km) |
