| Gretna to Commerce (California) | 1,666.00 mi (2,681.17 km) |
| Gretna to Commerce City (Colorado) | 1,081.74 mi (1,740.89 km) |
| Gretna to Compton (California) | 1,670.10 mi (2,687.76 km) |
| Gretna to Comstock Park (Michigan) | 939.05 mi (1,511.26 km) |
| Gretna to Concord (California) | 1,903.58 mi (3,063.51 km) |
| Gretna to Concord (Missouri) | 594.57 mi (956.87 km) |
| Gretna to Concord (New Hampshire) | 1,372.63 mi (2,209.03 km) |
| Gretna to Concord (North Carolina) | 665.42 mi (1,070.89 km) |
| Gretna to Conneaut (Ohio) | 983.93 mi (1,583.47 km) |
| Gretna to Connersville (Indiana) | 728.57 mi (1,172.52 km) |
| Gretna to Conroe (Texas) | 325.81 mi (524.34 km) |
| Gretna to Converse (Texas) | 496.17 mi (798.51 km) |
| Gretna to Conway (Arkansas) | 383.65 mi (617.42 km) |
| Gretna to Conway (Florida) | 534.75 mi (860.60 km) |
| Gretna to Conway (South Carolina) | 700.16 mi (1,126.79 km) |
