| Frederikssund to Oestrich-Winkel | 437.02 mi (703.31 km) |
| Frederikssund to Offenburg | 538.06 mi (865.92 km) |
| Frederikssund to Oftersheim | 469.67 mi (755.87 km) |
| Frederikssund to Ohrdruf | 350.16 mi (563.53 km) |
| Frederikssund to Ohringen | 470.76 mi (757.62 km) |
| Frederikssund to Olbernhau | 360.78 mi (580.62 km) |
| Frederikssund to Olching | 528.36 mi (850.32 km) |
| Frederikssund to Oldenburg | 241.66 mi (388.92 km) |
| Frederikssund to Oldenburg in Holstein | 115.82 mi (186.39 km) |
| Frederikssund to Olfen | 342.56 mi (551.30 km) |
| Frederikssund to Olpe | 375.51 mi (604.32 km) |
| Frederikssund to Olsberg | 342.74 mi (551.59 km) |
| Frederikssund to Oranienburg | 217.89 mi (350.67 km) |
| Frederikssund to Ortenberg | 398.45 mi (641.25 km) |
| Frederikssund to Oschatz | 316.09 mi (508.69 km) |
