| Barcelona to Octeville | 598.71 mi (963.53 km) |
| Barcelona to Oignies | 629.05 mi (1,012.35 km) |
| Barcelona to Oissel | 552.44 mi (889.07 km) |
| Barcelona to Olivet | 448.03 mi (721.03 km) |
| Barcelona to Ollioules | 223.47 mi (359.64 km) |
| Barcelona to Olonne-sur-Mer | 406.54 mi (654.26 km) |
| Barcelona to Oloron-Sainte-Marie | 189.48 mi (304.95 km) |
| Barcelona to Onet Village | 207.19 mi (333.44 km) |
| Barcelona to Onnaing | 625.92 mi (1,007.32 km) |
| Barcelona to Orange | 232.55 mi (374.25 km) |
| Barcelona to Orchies | 630.28 mi (1,014.34 km) |
| Barcelona to Orleans | 450.68 mi (725.30 km) |
| Barcelona to Orly | 508.73 mi (818.72 km) |
| Barcelona to Ormesson-sur-Marne | 511.82 mi (823.70 km) |
| Barcelona to Orsay | 505.46 mi (813.46 km) |
