| Santiago do Cacem to Octeville | 874.98 mi (1,408.14 km) |
| Santiago do Cacem to Oignies | 1,034.23 mi (1,664.43 km) |
| Santiago do Cacem to Oissel | 921.13 mi (1,482.42 km) |
| Santiago do Cacem to Olivet | 864.57 mi (1,391.38 km) |
| Santiago do Cacem to Ollioules | 839.92 mi (1,351.72 km) |
| Santiago do Cacem to Olonne-sur-Mer | 686.31 mi (1,104.52 km) |
| Santiago do Cacem to Oloron-Sainte-Marie | 554.70 mi (892.70 km) |
| Santiago do Cacem to Onet Village | 731.83 mi (1,177.77 km) |
| Santiago do Cacem to Onnaing | 1,046.63 mi (1,684.39 km) |
| Santiago do Cacem to Orange | 819.43 mi (1,318.75 km) |
| Santiago do Cacem to Orchies | 1,041.39 mi (1,675.95 km) |
| Santiago do Cacem to Orleans | 866.81 mi (1,395.00 km) |
| Santiago do Cacem to Orly | 925.12 mi (1,488.84 km) |
| Santiago do Cacem to Ormesson-sur-Marne | 931.66 mi (1,499.36 km) |
| Santiago do Cacem to Orsay | 916.63 mi (1,475.17 km) |
