| Formia to Carson (California) | 6,414.27 mi (10,322.77 km) |
| Formia to Carson City (Nevada) | 6,154.28 mi (9,904.36 km) |
| Formia to Carteret (New Jersey) | 4,368.11 mi (7,029.79 km) |
| Formia to Cartersville (Georgia) | 5,097.61 mi (8,203.82 km) |
| Formia to Carthage (Missouri) | 5,365.48 mi (8,634.91 km) |
| Formia to Cary (Illinois) | 4,892.59 mi (7,873.86 km) |
| Formia to Cary (North Carolina) | 4,761.66 mi (7,663.16 km) |
| Formia to Casa de Oro-Mount Helix (California) | 6,433.33 mi (10,353.45 km) |
| Formia to Casa Grande (Arizona) | 6,246.27 mi (10,052.41 km) |
| Formia to Casas Adobes (Arizona) | 6,250.10 mi (10,058.57 km) |
| Formia to Cascades (Virginia) | 4,566.54 mi (7,349.14 km) |
| Formia to Casper (Wyoming) | 5,528.28 mi (8,896.91 km) |
| Formia to Casselberry (Florida) | 5,178.87 mi (8,334.58 km) |
| Formia to Castaic (California) | 6,389.34 mi (10,282.65 km) |
| Formia to Castle Pines (Colorado) | 5,652.67 mi (9,097.10 km) |
