| Arouca to Octeville | 680.38 mi (1,094.96 km) |
| Arouca to Oignies | 851.38 mi (1,370.17 km) |
| Arouca to Oissel | 736.77 mi (1,185.71 km) |
| Arouca to Olivet | 691.82 mi (1,113.37 km) |
| Arouca to Ollioules | 738.08 mi (1,187.82 km) |
| Arouca to Olonne-sur-Mer | 503.85 mi (810.87 km) |
| Arouca to Oloron-Sainte-Marie | 421.58 mi (678.46 km) |
| Arouca to Onet Village | 599.05 mi (964.08 km) |
| Arouca to Onnaing | 866.07 mi (1,393.80 km) |
| Arouca to Orange | 699.62 mi (1,125.94 km) |
| Arouca to Orchies | 859.31 mi (1,382.92 km) |
| Arouca to Orleans | 693.83 mi (1,116.62 km) |
| Arouca to Orly | 748.84 mi (1,205.15 km) |
| Arouca to Ormesson-sur-Marne | 755.70 mi (1,216.19 km) |
| Arouca to Orsay | 739.79 mi (1,190.58 km) |
