| Glassboro to Oerlinghausen | 3,891.51 mi (6,262.77 km) |
| Glassboro to Oestrich-Winkel | 3,919.33 mi (6,307.55 km) |
| Glassboro to Offenburg | 3,960.40 mi (6,373.64 km) |
| Glassboro to Oftersheim | 3,961.07 mi (6,374.73 km) |
| Glassboro to Ohrdruf | 4,004.97 mi (6,445.38 km) |
| Glassboro to Ohringen | 4,003.44 mi (6,442.91 km) |
| Glassboro to Olbernhau | 4,112.05 mi (6,617.71 km) |
| Glassboro to Olching | 4,108.24 mi (6,611.57 km) |
| Glassboro to Oldenburg | 3,842.57 mi (6,184.02 km) |
| Glassboro to Oldenburg in Holstein | 3,912.44 mi (6,296.47 km) |
| Glassboro to Olfen | 3,847.75 mi (6,192.35 km) |
| Glassboro to Olpe | 3,884.46 mi (6,251.43 km) |
| Glassboro to Olsberg | 3,901.17 mi (6,278.32 km) |
| Glassboro to Oranienburg | 4,044.61 mi (6,509.17 km) |
| Glassboro to Ortenberg | 3,951.84 mi (6,359.88 km) |
