| Leiria to Octeville | 766.82 mi (1,234.08 km) |
| Leiria to Oignies | 935.30 mi (1,505.21 km) |
| Leiria to Oissel | 820.98 mi (1,321.23 km) |
| Leiria to Olivet | 772.52 mi (1,243.26 km) |
| Leiria to Ollioules | 792.70 mi (1,275.72 km) |
| Leiria to Olonne-sur-Mer | 587.15 mi (944.92 km) |
| Leiria to Oloron-Sainte-Marie | 486.04 mi (782.20 km) |
| Leiria to Onet Village | 664.97 mi (1,070.17 km) |
| Leiria to Onnaing | 949.37 mi (1,527.86 km) |
| Leiria to Orange | 761.10 mi (1,224.87 km) |
| Leiria to Orchies | 943.02 mi (1,517.65 km) |
| Leiria to Orleans | 774.62 mi (1,246.63 km) |
| Leiria to Orly | 830.75 mi (1,336.97 km) |
| Leiria to Ormesson-sur-Marne | 837.53 mi (1,347.87 km) |
| Leiria to Orsay | 821.86 mi (1,322.65 km) |
