| Povoa de Santa Iria to Oswego (Illinois) | 4,027.78 mi (6,482.09 km) |
| Povoa de Santa Iria to Oswego (New York) | 3,425.23 mi (5,512.37 km) |
| Povoa de Santa Iria to Otsego (Minnesota) | 4,155.80 mi (6,688.11 km) |
| Povoa de Santa Iria to Ottawa (Illinois) | 4,060.47 mi (6,534.70 km) |
| Povoa de Santa Iria to Ottawa (Kansas) | 4,450.71 mi (7,162.72 km) |
| Povoa de Santa Iria to Ottumwa (Iowa) | 4,237.15 mi (6,819.03 km) |
| Povoa de Santa Iria to Overland (Missouri) | 4,217.44 mi (6,787.31 km) |
| Povoa de Santa Iria to Overland Park (Kansas) | 4,413.86 mi (7,103.42 km) |
| Povoa de Santa Iria to Overlea (Maryland) | 3,526.24 mi (5,674.93 km) |
| Povoa de Santa Iria to Oviedo (Florida) | 4,096.45 mi (6,592.60 km) |
| Povoa de Santa Iria to Owasso (Oklahoma) | 4,559.89 mi (7,338.43 km) |
| Povoa de Santa Iria to Owatonna (Minnesota) | 4,175.42 mi (6,719.68 km) |
| Povoa de Santa Iria to Owensboro (Kentucky) | 4,091.97 mi (6,585.39 km) |
| Povoa de Santa Iria to Owings Mills (Maryland) | 3,538.51 mi (5,694.68 km) |
| Povoa de Santa Iria to Owosso (Michigan) | 3,796.85 mi (6,110.43 km) |
