| Grevenmacher to Olivenza | 1,010.45 mi (1,626.16 km) |
| Grevenmacher to Olot | 551.61 mi (887.73 km) |
| Grevenmacher to Onate | 623.16 mi (1,002.88 km) |
| Grevenmacher to Onda | 746.83 mi (1,201.91 km) |
| Grevenmacher to Onteniente | 826.49 mi (1,330.11 km) |
| Grevenmacher to Orihuela | 880.55 mi (1,417.11 km) |
| Grevenmacher to Osuna | 1,034.07 mi (1,664.18 km) |
| Grevenmacher to Ourense | 851.32 mi (1,370.07 km) |
| Grevenmacher to Oviedo | 727.84 mi (1,171.35 km) |
| Grevenmacher to Paiporta | 783.99 mi (1,261.72 km) |
| Grevenmacher to Pajara | 1,827.81 mi (2,941.58 km) |
| Grevenmacher to Palafolls | 581.32 mi (935.55 km) |
| Grevenmacher to Palafrugell | 559.01 mi (899.63 km) |
| Grevenmacher to Palamos | 564.24 mi (908.06 km) |
| Grevenmacher to Palencia | 746.46 mi (1,201.32 km) |
