| Oldenburg to Oerlinghausen | 83.53 mi (134.43 km) |
| Oldenburg to Oestrich-Winkel | 217.42 mi (349.90 km) |
| Oldenburg to Offenburg | 323.39 mi (520.45 km) |
| Oldenburg to Oftersheim | 261.20 mi (420.36 km) |
| Oldenburg to Ohrdruf | 192.56 mi (309.90 km) |
| Oldenburg to Ohringen | 278.12 mi (447.59 km) |
| Oldenburg to Olbernhau | 277.23 mi (446.16 km) |
| Oldenburg to Olching | 367.53 mi (591.48 km) |
| Oldenburg to Oldenburg in Holstein | 135.23 mi (217.63 km) |
| Oldenburg to Olfen | 104.63 mi (168.39 km) |
| Oldenburg to Olpe | 147.86 mi (237.96 km) |
| Oldenburg to Olsberg | 124.47 mi (200.31 km) |
| Oldenburg to Oranienburg | 210.79 mi (339.23 km) |
| Oldenburg to Ortenberg | 195.97 mi (315.38 km) |
| Oldenburg to Oschatz | 243.07 mi (391.19 km) |
