| Alsdorf to Oestrich-Winkel | 101.15 mi (162.79 km) |
| Alsdorf to Offenburg | 184.70 mi (297.24 km) |
| Alsdorf to Oftersheim | 149.64 mi (240.82 km) |
| Alsdorf to Ohrdruf | 199.16 mi (320.52 km) |
| Alsdorf to Ohringen | 188.13 mi (302.76 km) |
| Alsdorf to Olbernhau | 313.36 mi (504.30 km) |
| Alsdorf to Olching | 296.00 mi (476.36 km) |
| Alsdorf to Oldenburg | 178.80 mi (287.75 km) |
| Alsdorf to Oldenburg in Holstein | 307.96 mi (495.61 km) |
| Alsdorf to Olfen | 77.96 mi (125.46 km) |
| Alsdorf to Olpe | 73.13 mi (117.69 km) |
| Alsdorf to Olsberg | 105.52 mi (169.82 km) |
| Alsdorf to Oranienburg | 328.30 mi (528.34 km) |
| Alsdorf to Ortenberg | 131.76 mi (212.05 km) |
| Alsdorf to Oschatz | 302.45 mi (486.74 km) |
