| Piera to Oswego (Illinois) | 4,414.80 mi (7,104.93 km) |
| Piera to Oswego (New York) | 3,833.77 mi (6,169.85 km) |
| Piera to Otsego (Minnesota) | 4,495.47 mi (7,234.77 km) |
| Piera to Ottawa (Illinois) | 4,448.41 mi (7,159.02 km) |
| Piera to Ottawa (Kansas) | 4,836.06 mi (7,782.89 km) |
| Piera to Ottumwa (Iowa) | 4,615.09 mi (7,427.27 km) |
| Piera to Overland (Missouri) | 4,620.13 mi (7,435.39 km) |
| Piera to Overland Park (Kansas) | 4,799.32 mi (7,723.77 km) |
| Piera to Overlea (Maryland) | 3,968.83 mi (6,387.22 km) |
| Piera to Oviedo (Florida) | 4,594.89 mi (7,394.76 km) |
| Piera to Owasso (Oklahoma) | 4,959.27 mi (7,981.17 km) |
| Piera to Owatonna (Minnesota) | 4,526.15 mi (7,284.14 km) |
| Piera to Owensboro (Kentucky) | 4,512.86 mi (7,262.75 km) |
| Piera to Owings Mills (Maryland) | 3,979.93 mi (6,405.08 km) |
| Piera to Owosso (Michigan) | 4,186.73 mi (6,737.89 km) |
