| Alsdorf to Navodari | 1,134.02 mi (1,825.02 km) |
| Alsdorf to Negresti-Oas | 801.71 mi (1,290.23 km) |
| Alsdorf to Nehoiu | 1,000.38 mi (1,609.96 km) |
| Alsdorf to Ocna Mures | 862.82 mi (1,388.58 km) |
| Alsdorf to Odobesti | 1,018.93 mi (1,639.82 km) |
| Alsdorf to Odorheiu Secuiesc | 926.38 mi (1,490.86 km) |
| Alsdorf to Oltenita | 1,060.12 mi (1,706.11 km) |
| Alsdorf to Onesti | 990.75 mi (1,594.46 km) |
| Alsdorf to Oradea | 759.62 mi (1,222.48 km) |
| Alsdorf to Orastie | 853.15 mi (1,373.02 km) |
| Alsdorf to Oravita | 821.38 mi (1,321.88 km) |
| Alsdorf to Orsova | 862.36 mi (1,387.84 km) |
| Alsdorf to Otelu Rosu | 830.08 mi (1,335.88 km) |
| Alsdorf to Otopeni | 1,019.20 mi (1,640.24 km) |
| Alsdorf to Ovidiu | 1,133.62 mi (1,824.39 km) |
