| Leers to Oignies | 18.34 mi (29.51 km) |
| Leers to Oissel | 133.05 mi (214.12 km) |
| Leers to Olivet | 203.88 mi (328.12 km) |
| Leers to Ollioules | 535.32 mi (861.51 km) |
| Leers to Olonne-sur-Mer | 366.66 mi (590.08 km) |
| Leers to Oloron-Sainte-Marie | 548.11 mi (882.09 km) |
| Leers to Onet Village | 437.45 mi (704.01 km) |
| Leers to Onnaing | 25.58 mi (41.17 km) |
| Leers to Orange | 457.97 mi (737.02 km) |
| Leers to Orchies | 14.30 mi (23.02 km) |
| Leers to Orleans | 201.22 mi (323.83 km) |
| Leers to Orly | 139.18 mi (223.99 km) |
| Leers to Ormesson-sur-Marne | 134.73 mi (216.83 km) |
| Leers to Orsay | 144.96 mi (233.28 km) |
| Leers to Orthez | 531.50 mi (855.37 km) |
