| Geilenkirchen to Navodari | 1,137.47 mi (1,830.57 km) |
| Geilenkirchen to Negresti-Oas | 804.58 mi (1,294.85 km) |
| Geilenkirchen to Nehoiu | 1,003.81 mi (1,615.48 km) |
| Geilenkirchen to Ocna Mures | 866.22 mi (1,394.05 km) |
| Geilenkirchen to Odobesti | 1,022.15 mi (1,644.99 km) |
| Geilenkirchen to Odorheiu Secuiesc | 929.63 mi (1,496.09 km) |
| Geilenkirchen to Oltenita | 1,063.87 mi (1,712.13 km) |
| Geilenkirchen to Onesti | 993.84 mi (1,599.44 km) |
| Geilenkirchen to Oradea | 763.01 mi (1,227.95 km) |
| Geilenkirchen to Orastie | 856.83 mi (1,378.93 km) |
| Geilenkirchen to Oravita | 825.53 mi (1,328.56 km) |
| Geilenkirchen to Orsova | 866.50 mi (1,394.50 km) |
| Geilenkirchen to Otelu Rosu | 833.98 mi (1,342.17 km) |
| Geilenkirchen to Otopeni | 1,022.89 mi (1,646.18 km) |
| Geilenkirchen to Ovidiu | 1,137.09 mi (1,829.97 km) |
