| Porcia to Octeville | 707.16 mi (1,138.07 km) |
| Porcia to Oignies | 540.65 mi (870.10 km) |
| Porcia to Oissel | 584.12 mi (940.05 km) |
| Porcia to Olivet | 521.99 mi (840.06 km) |
| Porcia to Ollioules | 386.15 mi (621.44 km) |
| Porcia to Olonne-sur-Mer | 687.67 mi (1,106.69 km) |
| Porcia to Oloron-Sainte-Marie | 677.45 mi (1,090.24 km) |
| Porcia to Onet Village | 500.28 mi (805.12 km) |
| Porcia to Onnaing | 515.13 mi (829.02 km) |
| Porcia to Orange | 401.26 mi (645.77 km) |
| Porcia to Orchies | 531.49 mi (855.35 km) |
| Porcia to Orleans | 522.10 mi (840.24 km) |
| Porcia to Orly | 515.07 mi (828.93 km) |
| Porcia to Ormesson-sur-Marne | 509.70 mi (820.28 km) |
| Porcia to Orsay | 523.03 mi (841.74 km) |
