| Gaithersburg to Cordele (Georgia) | 617.53 mi (993.82 km) |
| Gaithersburg to Corinth (Mississippi) | 686.47 mi (1,104.76 km) |
| Gaithersburg to Corinth (Texas) | 1,179.65 mi (1,898.46 km) |
| Gaithersburg to Cornelius (North Carolina) | 323.46 mi (520.56 km) |
| Gaithersburg to Cornelius (Oregon) | 2,349.77 mi (3,781.59 km) |
| Gaithersburg to Corning (New York) | 208.30 mi (335.23 km) |
| Gaithersburg to Corona (California) | 2,251.90 mi (3,624.09 km) |
| Gaithersburg to Coronado (California) | 2,261.28 mi (3,639.18 km) |
| Gaithersburg to Corpus Christi (Texas) | 1,399.51 mi (2,252.30 km) |
| Gaithersburg to Corsicana (Texas) | 1,183.06 mi (1,903.95 km) |
| Gaithersburg to Cortland (New York) | 245.48 mi (395.07 km) |
| Gaithersburg to Corvallis (Oregon) | 2,368.28 mi (3,811.39 km) |
| Gaithersburg to Coshocton (Ohio) | 258.38 mi (415.82 km) |
| Gaithersburg to Costa Mesa (California) | 2,275.46 mi (3,661.99 km) |
| Gaithersburg to Coto de Caza (California) | 2,259.73 mi (3,636.68 km) |
