| Barth to Octeville | 691.34 mi (1,112.61 km) |
| Barth to Oignies | 489.64 mi (788.00 km) |
| Barth to Oissel | 604.34 mi (972.59 km) |
| Barth to Olivet | 648.26 mi (1,043.27 km) |
| Barth to Ollioules | 835.52 mi (1,344.63 km) |
| Barth to Olonne-sur-Mer | 833.29 mi (1,341.04 km) |
| Barth to Oloron-Sainte-Marie | 978.36 mi (1,574.52 km) |
| Barth to Onet Village | 825.82 mi (1,329.03 km) |
| Barth to Onnaing | 472.17 mi (759.89 km) |
| Barth to Orange | 790.43 mi (1,272.08 km) |
| Barth to Orchies | 480.66 mi (773.54 km) |
| Barth to Orleans | 646.02 mi (1,039.66 km) |
| Barth to Orly | 588.55 mi (947.18 km) |
| Barth to Ormesson-sur-Marne | 581.83 mi (936.37 km) |
| Barth to Orsay | 597.40 mi (961.43 km) |
