| Middle Island to Olivares | 3,498.33 mi (5,630.01 km) |
| Middle Island to Olivenza | 3,414.02 mi (5,494.34 km) |
| Middle Island to Olot | 3,766.99 mi (6,062.39 km) |
| Middle Island to Onate | 3,515.77 mi (5,658.08 km) |
| Middle Island to Onda | 3,705.93 mi (5,964.11 km) |
| Middle Island to Onteniente | 3,724.86 mi (5,994.59 km) |
| Middle Island to Orihuela | 3,731.70 mi (6,005.60 km) |
| Middle Island to Osuna | 3,555.67 mi (5,722.31 km) |
| Middle Island to Ourense | 3,278.21 mi (5,275.76 km) |
| Middle Island to Oviedo | 3,347.50 mi (5,387.28 km) |
| Middle Island to Paiporta | 3,715.05 mi (5,978.79 km) |
| Middle Island to Pajara | 3,390.95 mi (5,457.21 km) |
| Middle Island to Palafolls | 3,794.73 mi (6,107.03 km) |
| Middle Island to Palafrugell | 3,806.10 mi (6,125.33 km) |
| Middle Island to Palamos | 3,806.73 mi (6,126.35 km) |
