| Erie to Oerlinghausen | 3,968.25 mi (6,386.27 km) |
| Erie to Oestrich-Winkel | 4,008.09 mi (6,450.41 km) |
| Erie to Offenburg | 4,057.57 mi (6,530.03 km) |
| Erie to Oftersheim | 4,052.21 mi (6,521.41 km) |
| Erie to Ohrdruf | 4,084.40 mi (6,573.21 km) |
| Erie to Ohringen | 4,093.82 mi (6,588.37 km) |
| Erie to Olbernhau | 4,187.59 mi (6,739.28 km) |
| Erie to Olching | 4,200.44 mi (6,759.96 km) |
| Erie to Oldenburg | 3,913.39 mi (6,297.99 km) |
| Erie to Oldenburg in Holstein | 3,972.43 mi (6,393.01 km) |
| Erie to Olfen | 3,928.02 mi (6,321.53 km) |
| Erie to Olpe | 3,967.90 mi (6,385.72 km) |
| Erie to Olsberg | 3,981.65 mi (6,407.85 km) |
| Erie to Oranienburg | 4,109.20 mi (6,613.12 km) |
| Erie to Ortenberg | 4,036.81 mi (6,496.62 km) |
