| Portogruaro to Odessa (Texas) | 5,715.90 mi (9,198.86 km) |
| Portogruaro to Ogden (Utah) | 5,530.05 mi (8,899.76 km) |
| Portogruaro to Oildale (California) | 6,074.86 mi (9,776.55 km) |
| Portogruaro to Ojus (Florida) | 5,091.04 mi (8,193.23 km) |
| Portogruaro to Okemos (Michigan) | 4,496.16 mi (7,235.88 km) |
| Portogruaro to Oklahoma City (Oklahoma) | 5,346.87 mi (8,604.95 km) |
| Portogruaro to Okmulgee (Oklahoma) | 5,282.29 mi (8,501.03 km) |
| Portogruaro to Olathe (Kansas) | 5,073.14 mi (8,164.43 km) |
| Portogruaro to Old Jamestown (Missouri) | 4,903.00 mi (7,890.62 km) |
| Portogruaro to Oldsmar (Florida) | 5,103.13 mi (8,212.69 km) |
| Portogruaro to Olean (New York) | 4,286.34 mi (6,898.20 km) |
| Portogruaro to Olive Branch (Mississippi) | 5,073.34 mi (8,164.75 km) |
| Portogruaro to Olivehurst (California) | 5,928.69 mi (9,541.31 km) |
| Portogruaro to Olney (Maryland) | 4,355.68 mi (7,009.79 km) |
| Portogruaro to Olympia (Washington) | 5,484.89 mi (8,827.07 km) |
