| Gunbarrel to Olivares | 5,029.77 mi (8,094.63 km) |
| Gunbarrel to Olivenza | 4,935.47 mi (7,942.87 km) |
| Gunbarrel to Olot | 5,176.57 mi (8,330.89 km) |
| Gunbarrel to Onate | 4,946.78 mi (7,961.07 km) |
| Gunbarrel to Onda | 5,166.95 mi (8,315.41 km) |
| Gunbarrel to Onteniente | 5,203.55 mi (8,374.30 km) |
| Gunbarrel to Orihuela | 5,222.19 mi (8,404.31 km) |
| Gunbarrel to Osuna | 5,083.05 mi (8,180.37 km) |
| Gunbarrel to Ourense | 4,754.10 mi (7,650.99 km) |
| Gunbarrel to Oviedo | 4,795.55 mi (7,717.69 km) |
| Gunbarrel to Paiporta | 5,184.40 mi (8,343.49 km) |
| Gunbarrel to Pajara | 5,041.04 mi (8,112.78 km) |
| Gunbarrel to Palafolls | 5,210.00 mi (8,384.68 km) |
| Gunbarrel to Palafrugell | 5,214.65 mi (8,392.17 km) |
| Gunbarrel to Palamos | 5,216.60 mi (8,395.31 km) |
