| Valongo to Oswego (Illinois) | 3,973.96 mi (6,395.47 km) |
| Valongo to Oswego (New York) | 3,377.89 mi (5,436.19 km) |
| Valongo to Otsego (Minnesota) | 4,086.72 mi (6,576.94 km) |
| Valongo to Ottawa (Illinois) | 4,007.03 mi (6,448.69 km) |
| Valongo to Ottawa (Kansas) | 4,397.10 mi (7,076.45 km) |
| Valongo to Ottumwa (Iowa) | 4,180.61 mi (6,728.04 km) |
| Valongo to Overland (Missouri) | 4,169.55 mi (6,710.24 km) |
| Valongo to Overland Park (Kansas) | 4,360.23 mi (7,017.11 km) |
| Valongo to Overlea (Maryland) | 3,492.50 mi (5,620.63 km) |
| Valongo to Oviedo (Florida) | 4,089.05 mi (6,580.69 km) |
| Valongo to Owasso (Oklahoma) | 4,511.40 mi (7,260.39 km) |
| Valongo to Owatonna (Minnesota) | 4,109.84 mi (6,614.14 km) |
| Valongo to Owensboro (Kentucky) | 4,050.63 mi (6,518.86 km) |
| Valongo to Owings Mills (Maryland) | 3,504.31 mi (5,639.64 km) |
| Valongo to Owosso (Michigan) | 3,743.55 mi (6,024.67 km) |
