| Portogruaro to Nottingham | 798.44 mi (1,284.96 km) |
| Portogruaro to Nuneaton | 794.27 mi (1,278.25 km) |
| Portogruaro to Oadby | 782.81 mi (1,259.81 km) |
| Portogruaro to Oakengates | 836.02 mi (1,345.45 km) |
| Portogruaro to Oakham | 773.24 mi (1,244.41 km) |
| Portogruaro to Oldbury | 813.70 mi (1,309.52 km) |
| Portogruaro to Oldham | 854.16 mi (1,374.63 km) |
| Portogruaro to Ollerton | 803.31 mi (1,292.80 km) |
| Portogruaro to Olton | 803.71 mi (1,293.45 km) |
| Portogruaro to Omagh | 1,072.23 mi (1,725.59 km) |
| Portogruaro to Ormesby | 863.98 mi (1,390.44 km) |
| Portogruaro to Ormskirk | 881.76 mi (1,419.06 km) |
| Portogruaro to Orpington | 697.13 mi (1,121.93 km) |
| Portogruaro to Ossett | 841.05 mi (1,353.53 km) |
| Portogruaro to Oswaldtwistle | 871.10 mi (1,401.90 km) |
