| Portogruaro to Noventa Vicentina | 71.78 mi (115.52 km) |
| Portogruaro to Novi di Modena | 112.19 mi (180.55 km) |
| Portogruaro to Novi Ligure | 209.12 mi (336.55 km) |
| Portogruaro to Nuoro | 416.89 mi (670.92 km) |
| Portogruaro to Occhiobello | 85.09 mi (136.94 km) |
| Portogruaro to Oderzo | 16.41 mi (26.41 km) |
| Portogruaro to Oggiono | 167.83 mi (270.09 km) |
| Portogruaro to Olbia | 375.56 mi (604.41 km) |
| Portogruaro to Oleggio | 203.08 mi (326.82 km) |
| Portogruaro to Olgiate Comasco | 186.29 mi (299.80 km) |
| Portogruaro to Olgiate Olona | 190.84 mi (307.13 km) |
| Portogruaro to Omegna | 213.17 mi (343.07 km) |
| Portogruaro to Opera | 177.04 mi (284.92 km) |
| Portogruaro to Oppeano | 86.55 mi (139.28 km) |
| Portogruaro to Orbassano | 262.45 mi (422.38 km) |
