| Ystrad Mynach to Octeville | 155.82 mi (250.77 km) |
| Ystrad Mynach to Oignies | 282.51 mi (454.65 km) |
| Ystrad Mynach to Oissel | 247.94 mi (399.02 km) |
| Ystrad Mynach to Olivet | 347.40 mi (559.09 km) |
| Ystrad Mynach to Ollioules | 723.94 mi (1,165.07 km) |
| Ystrad Mynach to Olonne-sur-Mer | 358.95 mi (577.68 km) |
| Ystrad Mynach to Oloron-Sainte-Marie | 596.42 mi (959.85 km) |
| Ystrad Mynach to Onet Village | 570.09 mi (917.46 km) |
| Ystrad Mynach to Onnaing | 309.50 mi (498.09 km) |
| Ystrad Mynach to Orange | 637.84 mi (1,026.51 km) |
| Ystrad Mynach to Orchies | 292.82 mi (471.25 km) |
| Ystrad Mynach to Orleans | 345.60 mi (556.18 km) |
| Ystrad Mynach to Orly | 319.51 mi (514.20 km) |
| Ystrad Mynach to Ormesson-sur-Marne | 322.68 mi (519.30 km) |
| Ystrad Mynach to Orsay | 314.61 mi (506.32 km) |
