| Arcos de Valdevez to Oswego (Illinois) | 3,955.25 mi (6,365.36 km) |
| Arcos de Valdevez to Oswego (New York) | 3,361.22 mi (5,409.37 km) |
| Arcos de Valdevez to Otsego (Minnesota) | 4,063.80 mi (6,540.05 km) |
| Arcos de Valdevez to Ottawa (Illinois) | 3,988.42 mi (6,418.74 km) |
| Arcos de Valdevez to Ottawa (Kansas) | 4,378.31 mi (7,046.21 km) |
| Arcos de Valdevez to Ottumwa (Iowa) | 4,161.09 mi (6,696.62 km) |
| Arcos de Valdevez to Overland (Missouri) | 4,152.40 mi (6,682.65 km) |
| Arcos de Valdevez to Overland Park (Kansas) | 4,341.44 mi (6,986.87 km) |
| Arcos de Valdevez to Overlea (Maryland) | 3,479.55 mi (5,599.80 km) |
| Arcos de Valdevez to Oviedo (Florida) | 4,083.20 mi (6,571.27 km) |
| Arcos de Valdevez to Owasso (Oklahoma) | 4,493.97 mi (7,232.35 km) |
| Arcos de Valdevez to Owatonna (Minnesota) | 4,087.87 mi (6,578.78 km) |
| Arcos de Valdevez to Owensboro (Kentucky) | 4,035.34 mi (6,494.25 km) |
| Arcos de Valdevez to Owings Mills (Maryland) | 3,491.23 mi (5,618.59 km) |
| Arcos de Valdevez to Owosso (Michigan) | 3,725.08 mi (5,994.94 km) |
