| Portogruaro to Orangevale (California) | 5,943.05 mi (9,564.42 km) |
| Portogruaro to Orchards (Washington) | 5,557.40 mi (8,943.77 km) |
| Portogruaro to Orcutt (California) | 6,148.46 mi (9,895.00 km) |
| Portogruaro to Oregon (Ohio) | 4,504.83 mi (7,249.82 km) |
| Portogruaro to Oregon (Wisconsin) | 4,675.28 mi (7,524.14 km) |
| Portogruaro to Oregon City (Oregon) | 5,579.71 mi (8,979.67 km) |
| Portogruaro to Orem (Utah) | 5,574.12 mi (8,970.68 km) |
| Portogruaro to Orinda (California) | 6,017.30 mi (9,683.91 km) |
| Portogruaro to Orland Park (Illinois) | 4,678.97 mi (7,530.07 km) |
| Portogruaro to Orlando (Florida) | 5,023.99 mi (8,085.33 km) |
| Portogruaro to Ormond Beach (Florida) | 4,974.81 mi (8,006.18 km) |
| Portogruaro to Oro Valley (Arizona) | 5,993.87 mi (9,646.20 km) |
| Portogruaro to Oroville (California) | 5,903.72 mi (9,501.11 km) |
| Portogruaro to Oshkosh (Wisconsin) | 4,593.64 mi (7,392.75 km) |
| Portogruaro to Oskaloosa (Iowa) | 4,873.79 mi (7,843.61 km) |
