| Geldern to Navodari | 1,139.21 mi (1,833.38 km) |
| Geldern to Negresti-Oas | 802.25 mi (1,291.10 km) |
| Geldern to Nehoiu | 1,005.53 mi (1,618.24 km) |
| Geldern to Ocna Mures | 867.82 mi (1,396.62 km) |
| Geldern to Odobesti | 1,022.17 mi (1,645.02 km) |
| Geldern to Odorheiu Secuiesc | 929.96 mi (1,496.62 km) |
| Geldern to Oltenita | 1,068.06 mi (1,718.88 km) |
| Geldern to Onesti | 992.95 mi (1,598.00 km) |
| Geldern to Oradea | 764.73 mi (1,230.71 km) |
| Geldern to Orastie | 860.63 mi (1,385.05 km) |
| Geldern to Oravita | 833.41 mi (1,341.24 km) |
| Geldern to Orsova | 874.22 mi (1,406.92 km) |
| Geldern to Otelu Rosu | 839.72 mi (1,351.39 km) |
| Geldern to Otopeni | 1,026.68 mi (1,652.28 km) |
| Geldern to Ovidiu | 1,138.98 mi (1,833.02 km) |
