| West Mifflin to Odenton (Maryland) | 192.70 mi (310.13 km) |
| West Mifflin to Odessa (Texas) | 1,377.29 mi (2,216.53 km) |
| West Mifflin to Ogden (Utah) | 1,668.60 mi (2,685.36 km) |
| West Mifflin to Oildale (California) | 2,142.50 mi (3,448.03 km) |
| West Mifflin to Ojus (Florida) | 995.17 mi (1,601.58 km) |
| West Mifflin to Okemos (Michigan) | 283.89 mi (456.88 km) |
| West Mifflin to Oklahoma City (Oklahoma) | 1,015.35 mi (1,634.05 km) |
| West Mifflin to Okmulgee (Oklahoma) | 934.32 mi (1,503.64 km) |
| West Mifflin to Olathe (Kansas) | 799.22 mi (1,286.21 km) |
| West Mifflin to Old Jamestown (Missouri) | 562.00 mi (904.45 km) |
| West Mifflin to Oldsmar (Florida) | 864.76 mi (1,391.70 km) |
| West Mifflin to Olean (New York) | 141.64 mi (227.95 km) |
| West Mifflin to Olive Branch (Mississippi) | 658.60 mi (1,059.92 km) |
| West Mifflin to Olivehurst (California) | 2,194.64 mi (3,531.94 km) |
| West Mifflin to Olney (Maryland) | 172.32 mi (277.33 km) |
