| West Mifflin to Octeville | 3,701.83 mi (5,957.51 km) |
| West Mifflin to Oignies | 3,868.26 mi (6,225.36 km) |
| West Mifflin to Oissel | 3,822.56 mi (6,151.81 km) |
| West Mifflin to Olivet | 3,898.49 mi (6,274.02 km) |
| West Mifflin to Ollioules | 4,218.56 mi (6,789.12 km) |
| West Mifflin to Olonne-sur-Mer | 3,779.75 mi (6,082.92 km) |
| West Mifflin to Oloron-Sainte-Marie | 3,930.10 mi (6,324.89 km) |
| West Mifflin to Onet Village | 4,035.47 mi (6,494.47 km) |
| West Mifflin to Onnaing | 3,894.82 mi (6,268.10 km) |
| West Mifflin to Orange | 4,139.60 mi (6,662.05 km) |
| West Mifflin to Orchies | 3,878.15 mi (6,241.28 km) |
| West Mifflin to Orleans | 3,897.71 mi (6,272.76 km) |
| West Mifflin to Orly | 3,893.29 mi (6,265.64 km) |
| West Mifflin to Ormesson-sur-Marne | 3,898.08 mi (6,273.35 km) |
| West Mifflin to Orsay | 3,886.12 mi (6,254.11 km) |
