| Gretna to Nasaud | 5,730.63 mi (9,222.55 km) |
| Gretna to Navodari | 6,016.75 mi (9,683.02 km) |
| Gretna to Negresti-Oas | 5,669.68 mi (9,124.47 km) |
| Gretna to Nehoiu | 5,884.16 mi (9,469.65 km) |
| Gretna to Ocna Mures | 5,747.36 mi (9,249.48 km) |
| Gretna to Odobesti | 5,894.79 mi (9,486.75 km) |
| Gretna to Odorheiu Secuiesc | 5,805.07 mi (9,342.36 km) |
| Gretna to Oltenita | 5,951.82 mi (9,578.53 km) |
| Gretna to Onesti | 5,862.26 mi (9,434.40 km) |
| Gretna to Oradea | 5,645.47 mi (9,085.51 km) |
| Gretna to Orastie | 5,744.45 mi (9,244.79 km) |
| Gretna to Oravita | 5,718.24 mi (9,202.62 km) |
| Gretna to Orsova | 5,759.18 mi (9,268.51 km) |
| Gretna to Otelu Rosu | 5,725.12 mi (9,213.69 km) |
| Gretna to Otopeni | 5,909.92 mi (9,511.10 km) |
