| Hardenberg to Olivenza | 1,161.54 mi (1,869.32 km) |
| Hardenberg to Olot | 742.72 mi (1,195.29 km) |
| Hardenberg to Onate | 779.46 mi (1,254.42 km) |
| Hardenberg to Onda | 929.78 mi (1,496.33 km) |
| Hardenberg to Onteniente | 1,010.38 mi (1,626.05 km) |
| Hardenberg to Orihuela | 1,064.45 mi (1,713.07 km) |
| Hardenberg to Osuna | 1,201.17 mi (1,933.10 km) |
| Hardenberg to Ourense | 974.91 mi (1,568.96 km) |
| Hardenberg to Oviedo | 856.14 mi (1,377.82 km) |
| Hardenberg to Paiporta | 967.45 mi (1,556.95 km) |
| Hardenberg to Pajara | 1,980.78 mi (3,187.76 km) |
| Hardenberg to Palafolls | 774.28 mi (1,246.09 km) |
| Hardenberg to Palafrugell | 753.19 mi (1,212.14 km) |
| Hardenberg to Palamos | 758.38 mi (1,220.50 km) |
| Hardenberg to Palencia | 894.66 mi (1,439.82 km) |
