| Ahlen to Octeville | 442.22 mi (711.69 km) |
| Ahlen to Oignies | 230.41 mi (370.81 km) |
| Ahlen to Oissel | 342.00 mi (550.39 km) |
| Ahlen to Olivet | 379.13 mi (610.15 km) |
| Ahlen to Ollioules | 603.39 mi (971.07 km) |
| Ahlen to Olonne-sur-Mer | 565.91 mi (910.75 km) |
| Ahlen to Oloron-Sainte-Marie | 711.70 mi (1,145.37 km) |
| Ahlen to Onet Village | 566.28 mi (911.34 km) |
| Ahlen to Onnaing | 209.15 mi (336.60 km) |
| Ahlen to Orange | 545.66 mi (878.16 km) |
| Ahlen to Orchies | 220.27 mi (354.50 km) |
| Ahlen to Orleans | 376.90 mi (606.57 km) |
| Ahlen to Orly | 320.04 mi (515.05 km) |
| Ahlen to Ormesson-sur-Marne | 313.21 mi (504.07 km) |
| Ahlen to Orsay | 329.08 mi (529.60 km) |
