| Gretna to Redondela | 4,454.40 mi (7,168.66 km) |
| Gretna to Reinosa | 4,652.76 mi (7,487.90 km) |
| Gretna to Requena | 4,889.81 mi (7,869.39 km) |
| Gretna to Reus | 4,950.04 mi (7,966.32 km) |
| Gretna to Rianxo | 4,436.85 mi (7,140.42 km) |
| Gretna to Ribadeo | 4,502.86 mi (7,246.66 km) |
| Gretna to Rincon de la Victoria | 4,805.44 mi (7,733.61 km) |
| Gretna to Ripoll | 4,971.31 mi (8,000.55 km) |
| Gretna to Ripollet | 4,989.91 mi (8,030.48 km) |
| Gretna to Rojales | 4,947.27 mi (7,961.86 km) |
| Gretna to Ronda | 4,759.80 mi (7,660.15 km) |
| Gretna to Roquetas de Mar | 4,889.14 mi (7,868.31 km) |
| Gretna to Rosas | 5,015.31 mi (8,071.36 km) |
| Gretna to Rubi | 4,984.13 mi (8,021.18 km) |
| Gretna to Rute | 4,785.28 mi (7,701.17 km) |
