| Heerlerbaan to Octeville | 348.69 mi (561.17 km) |
| Heerlerbaan to Oignies | 134.95 mi (217.19 km) |
| Heerlerbaan to Oissel | 242.11 mi (389.64 km) |
| Heerlerbaan to Olivet | 277.96 mi (447.33 km) |
| Heerlerbaan to Ollioules | 534.13 mi (859.60 km) |
| Heerlerbaan to Olonne-sur-Mer | 463.88 mi (746.55 km) |
| Heerlerbaan to Oloron-Sainte-Marie | 614.50 mi (988.94 km) |
| Heerlerbaan to Onet Village | 476.56 mi (766.96 km) |
| Heerlerbaan to Onnaing | 110.83 mi (178.36 km) |
| Heerlerbaan to Orange | 468.41 mi (753.83 km) |
| Heerlerbaan to Orchies | 124.14 mi (199.79 km) |
| Heerlerbaan to Orleans | 275.67 mi (443.66 km) |
| Heerlerbaan to Orly | 218.09 mi (350.98 km) |
| Heerlerbaan to Ormesson-sur-Marne | 211.31 mi (340.07 km) |
| Heerlerbaan to Orsay | 227.07 mi (365.44 km) |
