| Povoa de Varzim to Oswego (Illinois) | 3,955.50 mi (6,365.76 km) |
| Povoa de Varzim to Oswego (New York) | 3,359.70 mi (5,406.91 km) |
| Povoa de Varzim to Otsego (Minnesota) | 4,067.82 mi (6,546.53 km) |
| Povoa de Varzim to Ottawa (Illinois) | 3,988.59 mi (6,419.01 km) |
| Povoa de Varzim to Ottawa (Kansas) | 4,378.64 mi (7,046.74 km) |
| Povoa de Varzim to Ottumwa (Iowa) | 4,162.06 mi (6,698.18 km) |
| Povoa de Varzim to Overland (Missouri) | 4,151.30 mi (6,680.87 km) |
| Povoa de Varzim to Overland Park (Kansas) | 4,341.76 mi (6,987.39 km) |
| Povoa de Varzim to Overlea (Maryland) | 3,474.89 mi (5,592.30 km) |
| Povoa de Varzim to Oviedo (Florida) | 4,072.87 mi (6,554.65 km) |
| Povoa de Varzim to Owasso (Oklahoma) | 4,493.11 mi (7,230.97 km) |
| Povoa de Varzim to Owatonna (Minnesota) | 4,091.03 mi (6,583.87 km) |
| Povoa de Varzim to Owensboro (Kentucky) | 4,032.65 mi (6,489.92 km) |
| Povoa de Varzim to Owings Mills (Maryland) | 3,486.68 mi (5,611.27 km) |
| Povoa de Varzim to Owosso (Michigan) | 3,725.12 mi (5,995.01 km) |
