| Groves to Olivares | 4,886.52 mi (7,864.10 km) |
| Groves to Olivenza | 4,804.62 mi (7,732.29 km) |
| Groves to Olot | 5,162.55 mi (8,308.32 km) |
| Groves to Onate | 4,911.87 mi (7,904.90 km) |
| Groves to Onda | 5,101.91 mi (8,210.73 km) |
| Groves to Onteniente | 5,119.77 mi (8,239.48 km) |
| Groves to Orihuela | 5,125.48 mi (8,248.67 km) |
| Groves to Osuna | 4,944.43 mi (7,957.29 km) |
| Groves to Ourense | 4,674.11 mi (7,522.25 km) |
| Groves to Oviedo | 4,743.83 mi (7,634.46 km) |
| Groves to Paiporta | 5,110.61 mi (8,224.74 km) |
| Groves to Pajara | 4,710.05 mi (7,580.09 km) |
| Groves to Palafolls | 5,190.59 mi (8,353.45 km) |
| Groves to Palafrugell | 5,201.67 mi (8,371.28 km) |
| Groves to Palamos | 5,202.37 mi (8,372.41 km) |
