| Idar-Oberstein to Olivenza | 1,040.56 mi (1,674.61 km) |
| Idar-Oberstein to Olot | 569.21 mi (916.05 km) |
| Idar-Oberstein to Onate | 653.25 mi (1,051.30 km) |
| Idar-Oberstein to Onda | 768.19 mi (1,236.28 km) |
| Idar-Oberstein to Onteniente | 847.19 mi (1,363.42 km) |
| Idar-Oberstein to Orihuela | 901.12 mi (1,450.21 km) |
| Idar-Oberstein to Osuna | 1,060.33 mi (1,706.44 km) |
| Idar-Oberstein to Ourense | 886.05 mi (1,425.95 km) |
| Idar-Oberstein to Oviedo | 762.27 mi (1,226.76 km) |
| Idar-Oberstein to Paiporta | 805.01 mi (1,295.54 km) |
| Idar-Oberstein to Pajara | 1,856.67 mi (2,988.02 km) |
| Idar-Oberstein to Palafolls | 597.42 mi (961.45 km) |
| Idar-Oberstein to Palafrugell | 574.17 mi (924.04 km) |
| Idar-Oberstein to Palamos | 579.42 mi (932.49 km) |
| Idar-Oberstein to Palencia | 777.74 mi (1,251.66 km) |
