| Porvoo to Oignies | 1,112.98 mi (1,791.16 km) |
| Porvoo to Oissel | 1,227.63 mi (1,975.69 km) |
| Porvoo to Olivet | 1,281.26 mi (2,061.98 km) |
| Porvoo to Ollioules | 1,450.23 mi (2,333.93 km) |
| Porvoo to Olonne-sur-Mer | 1,461.03 mi (2,351.30 km) |
| Porvoo to Oloron-Sainte-Marie | 1,613.56 mi (2,596.78 km) |
| Porvoo to Onet Village | 1,458.70 mi (2,347.56 km) |
| Porvoo to Onnaing | 1,098.95 mi (1,768.59 km) |
| Porvoo to Orange | 1,415.04 mi (2,277.29 km) |
| Porvoo to Orchies | 1,105.15 mi (1,778.57 km) |
| Porvoo to Orleans | 1,278.93 mi (2,058.24 km) |
| Porvoo to Orly | 1,219.91 mi (1,963.26 km) |
| Porvoo to Ormesson-sur-Marne | 1,213.43 mi (1,952.83 km) |
| Porvoo to Orsay | 1,228.36 mi (1,976.86 km) |
| Porvoo to Orthez | 1,601.25 mi (2,576.97 km) |
