| Ericeira to Oswego (Illinois) | 4,008.10 mi (6,450.41 km) |
| Ericeira to Oswego (New York) | 3,405.43 mi (5,480.51 km) |
| Ericeira to Otsego (Minnesota) | 4,136.56 mi (6,657.15 km) |
| Ericeira to Ottawa (Illinois) | 4,040.78 mi (6,503.00 km) |
| Ericeira to Ottawa (Kansas) | 4,431.01 mi (7,131.02 km) |
| Ericeira to Ottumwa (Iowa) | 4,217.52 mi (6,787.44 km) |
| Ericeira to Overland (Missouri) | 4,197.63 mi (6,755.43 km) |
| Ericeira to Overland Park (Kansas) | 4,394.16 mi (7,071.72 km) |
| Ericeira to Overlea (Maryland) | 3,506.27 mi (5,642.80 km) |
| Ericeira to Oviedo (Florida) | 4,076.59 mi (6,560.63 km) |
| Ericeira to Owasso (Oklahoma) | 4,540.08 mi (7,306.56 km) |
| Ericeira to Owatonna (Minnesota) | 4,156.06 mi (6,688.52 km) |
| Ericeira to Owensboro (Kentucky) | 4,072.07 mi (6,553.36 km) |
| Ericeira to Owings Mills (Maryland) | 3,518.55 mi (5,662.55 km) |
| Ericeira to Owosso (Michigan) | 3,777.16 mi (6,078.74 km) |
