| Porvoo to Novi di Modena | 1,230.60 mi (1,980.46 km) |
| Porvoo to Novi Ligure | 1,283.67 mi (2,065.87 km) |
| Porvoo to Nuoro | 1,553.04 mi (2,499.37 km) |
| Porvoo to Occhiobello | 1,215.34 mi (1,955.91 km) |
| Porvoo to Oderzo | 1,143.29 mi (1,839.95 km) |
| Porvoo to Oggiono | 1,208.19 mi (1,944.39 km) |
| Porvoo to Olbia | 1,511.26 mi (2,432.13 km) |
| Porvoo to Oleggio | 1,235.53 mi (1,988.39 km) |
| Porvoo to Olgiate Comasco | 1,216.78 mi (1,958.22 km) |
| Porvoo to Olgiate Olona | 1,227.82 mi (1,975.99 km) |
| Porvoo to Omegna | 1,223.83 mi (1,969.57 km) |
| Porvoo to Opera | 1,235.70 mi (1,988.67 km) |
| Porvoo to Oppeano | 1,199.33 mi (1,930.13 km) |
| Porvoo to Orbassano | 1,296.86 mi (2,087.09 km) |
| Porvoo to Orbetello | 1,381.05 mi (2,222.58 km) |
