| Grad to Olivenza | 1,297.28 mi (2,087.77 km) |
| Grad to Olot | 741.40 mi (1,193.17 km) |
| Grad to Onate | 939.99 mi (1,512.77 km) |
| Grad to Onda | 945.03 mi (1,520.87 km) |
| Grad to Onteniente | 1,007.07 mi (1,620.72 km) |
| Grad to Orihuela | 1,053.58 mi (1,695.58 km) |
| Grad to Osuna | 1,267.02 mi (2,039.06 km) |
| Grad to Ourense | 1,213.85 mi (1,953.50 km) |
| Grad to Oviedo | 1,092.78 mi (1,758.65 km) |
| Grad to Paiporta | 973.44 mi (1,566.61 km) |
| Grad to Pajara | 2,066.25 mi (3,325.31 km) |
| Grad to Palafolls | 748.41 mi (1,204.45 km) |
| Grad to Palafrugell | 721.28 mi (1,160.78 km) |
| Grad to Palamos | 725.41 mi (1,167.44 km) |
| Grad to Palencia | 1,066.93 mi (1,717.06 km) |
