| Gaithersburg to Castrovillari | 4,723.65 mi (7,601.97 km) |
| Gaithersburg to Catania | 4,762.71 mi (7,664.83 km) |
| Gaithersburg to Catanzaro | 4,776.67 mi (7,687.30 km) |
| Gaithersburg to Cattolica | 4,420.58 mi (7,114.23 km) |
| Gaithersburg to Cava de' Tirreni | 4,624.07 mi (7,441.71 km) |
| Gaithersburg to Cavallino | 4,792.02 mi (7,712.00 km) |
| Gaithersburg to Cavarzere | 4,352.45 mi (7,004.59 km) |
| Gaithersburg to Cave | 4,505.38 mi (7,250.71 km) |
| Gaithersburg to Cavriago | 4,301.02 mi (6,921.82 km) |
| Gaithersburg to Cavriglia | 4,382.19 mi (7,052.45 km) |
| Gaithersburg to Cazzago San Martino | 4,250.20 mi (6,840.03 km) |
| Gaithersburg to Ceccano | 4,532.00 mi (7,293.55 km) |
| Gaithersburg to Cecina | 4,346.88 mi (6,995.63 km) |
| Gaithersburg to Cefalu | 4,693.47 mi (7,553.41 km) |
| Gaithersburg to Ceglie Messapico | 4,748.65 mi (7,642.21 km) |
