| Halden to Olivenza | 1,632.71 mi (2,627.59 km) |
| Halden to Olot | 1,232.65 mi (1,983.75 km) |
| Halden to Onate | 1,259.30 mi (2,026.65 km) |
| Halden to Onda | 1,420.09 mi (2,285.42 km) |
| Halden to Onteniente | 1,500.79 mi (2,415.28 km) |
| Halden to Orihuela | 1,554.82 mi (2,502.24 km) |
| Halden to Osuna | 1,683.91 mi (2,709.99 km) |
| Halden to Ourense | 1,424.54 mi (2,292.57 km) |
| Halden to Oviedo | 1,313.66 mi (2,114.13 km) |
| Halden to Paiporta | 1,457.81 mi (2,346.12 km) |
| Halden to Pajara | 2,447.48 mi (3,938.84 km) |
| Halden to Palafolls | 1,263.49 mi (2,033.39 km) |
| Halden to Palafrugell | 1,241.67 mi (1,998.27 km) |
| Halden to Palamos | 1,246.89 mi (2,006.68 km) |
| Halden to Palencia | 1,367.30 mi (2,200.45 km) |
