| Gaillac to Oignies | 456.74 mi (735.05 km) |
| Gaillac to Oissel | 377.90 mi (608.16 km) |
| Gaillac to Olivet | 273.84 mi (440.70 km) |
| Gaillac to Ollioules | 204.68 mi (329.40 km) |
| Gaillac to Olonne-sur-Mer | 255.06 mi (410.47 km) |
| Gaillac to Oloron-Sainte-Marie | 134.60 mi (216.62 km) |
| Gaillac to Onet Village | 47.13 mi (75.85 km) |
| Gaillac to Onnaing | 455.25 mi (732.66 km) |
| Gaillac to Orange | 145.58 mi (234.28 km) |
| Gaillac to Orchies | 458.58 mi (738.01 km) |
| Gaillac to Orleans | 276.50 mi (444.99 km) |
| Gaillac to Orly | 335.47 mi (539.88 km) |
| Gaillac to Ormesson-sur-Marne | 338.91 mi (545.42 km) |
| Gaillac to Orsay | 331.76 mi (533.92 km) |
| Gaillac to Orthez | 136.35 mi (219.43 km) |
