| Gladbeck to Olivenza | 1,119.45 mi (1,801.58 km) |
| Gladbeck to Olot | 681.69 mi (1,097.08 km) |
| Gladbeck to Onate | 734.23 mi (1,181.62 km) |
| Gladbeck to Onda | 873.20 mi (1,405.29 km) |
| Gladbeck to Onteniente | 953.42 mi (1,534.38 km) |
| Gladbeck to Orihuela | 1,007.53 mi (1,621.46 km) |
| Gladbeck to Osuna | 1,152.29 mi (1,854.42 km) |
| Gladbeck to Ourense | 943.29 mi (1,518.07 km) |
| Gladbeck to Oviedo | 822.23 mi (1,323.25 km) |
| Gladbeck to Paiporta | 910.66 mi (1,465.57 km) |
| Gladbeck to Pajara | 1,938.74 mi (3,120.11 km) |
| Gladbeck to Palafolls | 712.21 mi (1,146.19 km) |
| Gladbeck to Palafrugell | 690.35 mi (1,111.01 km) |
| Gladbeck to Palamos | 695.57 mi (1,119.42 km) |
| Gladbeck to Palencia | 853.10 mi (1,372.94 km) |
