| Boom to Olivenza | 1,021.50 mi (1,643.95 km) |
| Boom to Olot | 621.37 mi (1,000.00 km) |
| Boom to Onate | 640.70 mi (1,031.11 km) |
| Boom to Onda | 799.99 mi (1,287.46 km) |
| Boom to Onteniente | 880.86 mi (1,417.60 km) |
| Boom to Orihuela | 934.72 mi (1,504.28 km) |
| Boom to Osuna | 1,063.75 mi (1,711.95 km) |
| Boom to Ourense | 835.12 mi (1,344.00 km) |
| Boom to Oviedo | 715.88 mi (1,152.10 km) |
| Boom to Paiporta | 837.81 mi (1,348.32 km) |
| Boom to Pajara | 1,840.60 mi (2,962.16 km) |
| Boom to Palafolls | 654.95 mi (1,054.05 km) |
| Boom to Palafrugell | 635.86 mi (1,023.32 km) |
| Boom to Palamos | 640.94 mi (1,031.49 km) |
| Boom to Palencia | 754.63 mi (1,214.45 km) |
