| West Mifflin to Nuth | 3,969.95 mi (6,389.01 km) |
| West Mifflin to Oegstgeest | 3,877.96 mi (6,240.97 km) |
| West Mifflin to Oirschot | 3,929.90 mi (6,324.56 km) |
| West Mifflin to Oisterwijk | 3,923.58 mi (6,314.39 km) |
| West Mifflin to Oldebroek | 3,925.48 mi (6,317.45 km) |
| West Mifflin to Oldenzaal | 3,968.85 mi (6,387.24 km) |
| West Mifflin to Ommen | 3,943.26 mi (6,346.07 km) |
| West Mifflin to Oosterend | 3,915.86 mi (6,301.97 km) |
| West Mifflin to Oosterhout | 3,908.48 mi (6,290.09 km) |
| West Mifflin to Oosterwolde | 3,924.75 mi (6,316.27 km) |
| West Mifflin to Oostzaan | 3,886.98 mi (6,255.49 km) |
| West Mifflin to Opmeer | 3,882.02 mi (6,247.51 km) |
| West Mifflin to Oss | 3,930.56 mi (6,325.62 km) |
| West Mifflin to Oud-Beijerland | 3,885.72 mi (6,253.46 km) |
| West Mifflin to Oudenbosch | 3,897.02 mi (6,271.65 km) |
