| Piera to Orangevale (California) | 5,836.43 mi (9,392.83 km) |
| Piera to Orchards (Washington) | 5,502.82 mi (8,855.94 km) |
| Piera to Orcutt (California) | 6,012.80 mi (9,676.67 km) |
| Piera to Oregon (Ohio) | 4,202.20 mi (6,762.78 km) |
| Piera to Oregon (Wisconsin) | 4,412.25 mi (7,100.83 km) |
| Piera to Oregon City (Oregon) | 5,523.36 mi (8,889.00 km) |
| Piera to Orem (Utah) | 5,415.13 mi (8,714.81 km) |
| Piera to Orinda (California) | 5,912.46 mi (9,515.19 km) |
| Piera to Orland Park (Illinois) | 4,397.20 mi (7,076.61 km) |
| Piera to Orlando (Florida) | 4,609.58 mi (7,418.40 km) |
| Piera to Ormond Beach (Florida) | 4,564.82 mi (7,346.37 km) |
| Piera to Oro Valley (Arizona) | 5,777.07 mi (9,297.30 km) |
| Piera to Oroville (California) | 5,804.45 mi (9,341.36 km) |
| Piera to Oshkosh (Wisconsin) | 4,336.11 mi (6,978.30 km) |
| Piera to Oskaloosa (Iowa) | 4,613.47 mi (7,424.67 km) |
