| Caldas da Rainha to Octeville | 795.83 mi (1,280.77 km) |
| Caldas da Rainha to Oignies | 964.92 mi (1,552.89 km) |
| Caldas da Rainha to Oissel | 850.57 mi (1,368.87 km) |
| Caldas da Rainha to Olivet | 802.17 mi (1,290.96 km) |
| Caldas da Rainha to Ollioules | 818.30 mi (1,316.93 km) |
| Caldas da Rainha to Olonne-sur-Mer | 616.80 mi (992.64 km) |
| Caldas da Rainha to Oloron-Sainte-Marie | 513.88 mi (827.00 km) |
| Caldas da Rainha to Onet Village | 692.85 mi (1,115.03 km) |
| Caldas da Rainha to Onnaing | 979.03 mi (1,575.60 km) |
| Caldas da Rainha to Orange | 788.11 mi (1,268.34 km) |
| Caldas da Rainha to Orchies | 972.66 mi (1,565.35 km) |
| Caldas da Rainha to Orleans | 804.26 mi (1,294.34 km) |
| Caldas da Rainha to Orly | 860.43 mi (1,384.73 km) |
| Caldas da Rainha to Ormesson-sur-Marne | 867.20 mi (1,395.62 km) |
| Caldas da Rainha to Orsay | 851.53 mi (1,370.41 km) |
