| West Mifflin to Orangeburg (South Carolina) | 477.29 mi (768.12 km) |
| West Mifflin to Orangevale (California) | 2,184.80 mi (3,516.09 km) |
| West Mifflin to Orchards (Washington) | 2,158.10 mi (3,473.13 km) |
| West Mifflin to Orcutt (California) | 2,229.84 mi (3,588.58 km) |
| West Mifflin to Oregon (Ohio) | 204.37 mi (328.90 km) |
| West Mifflin to Oregon (Wisconsin) | 520.37 mi (837.46 km) |
| West Mifflin to Oregon City (Oregon) | 2,163.57 mi (3,481.93 km) |
| West Mifflin to Orem (Utah) | 1,665.46 mi (2,680.29 km) |
| West Mifflin to Orinda (California) | 2,250.87 mi (3,622.42 km) |
| West Mifflin to Orland Park (Illinois) | 423.62 mi (681.75 km) |
| West Mifflin to Orlando (Florida) | 824.88 mi (1,327.52 km) |
| West Mifflin to Ormond Beach (Florida) | 767.12 mi (1,234.56 km) |
| West Mifflin to Oro Valley (Arizona) | 1,802.30 mi (2,900.52 km) |
| West Mifflin to Oroville (California) | 2,187.22 mi (3,520.00 km) |
| West Mifflin to Oshkosh (Wisconsin) | 509.90 mi (820.61 km) |
