| Ilmenau to Olivenza | 1,206.80 mi (1,942.15 km) |
| Ilmenau to Olot | 710.48 mi (1,143.41 km) |
| Ilmenau to Onate | 820.28 mi (1,320.11 km) |
| Ilmenau to Onda | 916.47 mi (1,474.92 km) |
| Ilmenau to Onteniente | 993.23 mi (1,598.44 km) |
| Ilmenau to Orihuela | 1,046.44 mi (1,684.09 km) |
| Ilmenau to Osuna | 1,218.77 mi (1,961.42 km) |
| Ilmenau to Ourense | 1,058.53 mi (1,703.53 km) |
| Ilmenau to Oviedo | 934.57 mi (1,504.05 km) |
| Ilmenau to Paiporta | 952.16 mi (1,532.36 km) |
| Ilmenau to Pajara | 2,019.64 mi (3,250.29 km) |
| Ilmenau to Palafolls | 734.31 mi (1,181.76 km) |
| Ilmenau to Palafrugell | 709.02 mi (1,141.05 km) |
| Ilmenau to Palamos | 714.20 mi (1,149.40 km) |
| Ilmenau to Palencia | 946.33 mi (1,522.98 km) |
