| West Mifflin to Olivares | 3,852.23 mi (6,199.56 km) |
| West Mifflin to Olivenza | 3,766.15 mi (6,061.04 km) |
| West Mifflin to Olot | 4,101.81 mi (6,601.23 km) |
| West Mifflin to Onate | 3,853.14 mi (6,201.02 km) |
| West Mifflin to Onda | 4,049.29 mi (6,516.70 km) |
| West Mifflin to Onteniente | 4,071.20 mi (6,551.96 km) |
| West Mifflin to Orihuela | 4,079.96 mi (6,566.06 km) |
| West Mifflin to Osuna | 3,909.12 mi (6,291.12 km) |
| West Mifflin to Ourense | 3,622.34 mi (5,829.60 km) |
| West Mifflin to Oviedo | 3,687.07 mi (5,933.77 km) |
| West Mifflin to Paiporta | 4,059.82 mi (6,533.66 km) |
| West Mifflin to Pajara | 3,757.70 mi (6,047.43 km) |
| West Mifflin to Palafolls | 4,130.68 mi (6,647.68 km) |
| West Mifflin to Palafrugell | 4,140.93 mi (6,664.18 km) |
| West Mifflin to Palamos | 4,141.80 mi (6,665.58 km) |
