| Arruda dos Vinhos to Octeville | 820.95 mi (1,321.19 km) |
| Arruda dos Vinhos to Oignies | 987.43 mi (1,589.12 km) |
| Arruda dos Vinhos to Oissel | 873.37 mi (1,405.55 km) |
| Arruda dos Vinhos to Olivet | 822.63 mi (1,323.89 km) |
| Arruda dos Vinhos to Ollioules | 826.90 mi (1,330.77 km) |
| Arruda dos Vinhos to Olonne-sur-Mer | 639.09 mi (1,028.52 km) |
| Arruda dos Vinhos to Oloron-Sainte-Marie | 527.54 mi (848.99 km) |
| Arruda dos Vinhos to Onet Village | 706.37 mi (1,136.80 km) |
| Arruda dos Vinhos to Onnaing | 1,001.07 mi (1,611.07 km) |
| Arruda dos Vinhos to Orange | 799.53 mi (1,286.72 km) |
| Arruda dos Vinhos to Orchies | 995.01 mi (1,601.32 km) |
| Arruda dos Vinhos to Orleans | 824.77 mi (1,327.33 km) |
| Arruda dos Vinhos to Orly | 881.58 mi (1,418.77 km) |
| Arruda dos Vinhos to Ormesson-sur-Marne | 888.29 mi (1,429.57 km) |
| Arruda dos Vinhos to Orsay | 872.80 mi (1,404.63 km) |
