| Gaithersburg to Cabestany | 4,028.71 mi (6,483.58 km) |
| Gaithersburg to Cabries | 4,115.42 mi (6,623.13 km) |
| Gaithersburg to Cachan | 3,829.17 mi (6,162.45 km) |
| Gaithersburg to Caen | 3,705.26 mi (5,963.04 km) |
| Gaithersburg to Cagnes-sur-Mer | 4,187.12 mi (6,738.53 km) |
| Gaithersburg to Cahors | 3,908.67 mi (6,290.40 km) |
| Gaithersburg to Calais | 3,755.40 mi (6,043.73 km) |
| Gaithersburg to Caluire-et-Cuire | 4,020.37 mi (6,470.16 km) |
| Gaithersburg to Cambrai | 3,831.06 mi (6,165.49 km) |
| Gaithersburg to Canet-en-Roussillon | 4,030.88 mi (6,487.08 km) |
| Gaithersburg to Cannes | 4,184.71 mi (6,734.65 km) |
| Gaithersburg to Canteleu | 3,757.96 mi (6,047.85 km) |
| Gaithersburg to Capbreton | 3,800.69 mi (6,116.61 km) |
| Gaithersburg to Carcassonne | 3,985.80 mi (6,414.52 km) |
| Gaithersburg to Carmaux | 3,952.42 mi (6,360.80 km) |
