| Gretna to Rosemont (California) | 1,874.55 mi (3,016.79 km) |
| Gretna to Rosemount (Minnesota) | 1,038.19 mi (1,670.81 km) |
| Gretna to Rosenberg (Texas) | 347.13 mi (558.64 km) |
| Gretna to Roseville (California) | 1,875.12 mi (3,017.71 km) |
| Gretna to Roseville (Michigan) | 955.60 mi (1,537.89 km) |
| Gretna to Roseville (Minnesota) | 1,057.24 mi (1,701.47 km) |
| Gretna to Rossmoor (California) | 1,661.45 mi (2,673.85 km) |
| Gretna to Rossville (Maryland) | 1,008.68 mi (1,623.31 km) |
| Gretna to Roswell (Georgia) | 439.18 mi (706.79 km) |
| Gretna to Roswell (New Mexico) | 883.73 mi (1,422.22 km) |
| Gretna to Round Lake (Illinois) | 865.83 mi (1,393.42 km) |
| Gretna to Round Lake Beach (Illinois) | 868.44 mi (1,397.62 km) |
| Gretna to Round Rock (Texas) | 456.42 mi (734.53 km) |
| Gretna to Rowland Heights (California) | 1,651.01 mi (2,657.05 km) |
| Gretna to Rowlett (Texas) | 435.65 mi (701.12 km) |
