| Barrow in Furness to Octeville | 317.06 mi (510.26 km) |
| Barrow in Furness to Oignies | 363.62 mi (585.19 km) |
| Barrow in Furness to Oissel | 377.61 mi (607.70 km) |
| Barrow in Furness to Olivet | 485.51 mi (781.35 km) |
| Barrow in Furness to Ollioules | 862.31 mi (1,387.75 km) |
| Barrow in Furness to Olonne-sur-Mer | 527.24 mi (848.51 km) |
| Barrow in Furness to Oloron-Sainte-Marie | 763.54 mi (1,228.80 km) |
| Barrow in Furness to Onet Village | 722.10 mi (1,162.10 km) |
| Barrow in Furness to Onnaing | 386.34 mi (621.76 km) |
| Barrow in Furness to Orange | 777.81 mi (1,251.77 km) |
| Barrow in Furness to Orchies | 371.05 mi (597.15 km) |
| Barrow in Furness to Orleans | 483.27 mi (777.75 km) |
| Barrow in Furness to Orly | 442.52 mi (712.17 km) |
| Barrow in Furness to Ormesson-sur-Marne | 443.50 mi (713.74 km) |
| Barrow in Furness to Orsay | 440.51 mi (708.94 km) |
