| Frederikshavn to Oestrich-Winkel | 524.36 mi (843.88 km) |
| Frederikshavn to Offenburg | 629.32 mi (1,012.80 km) |
| Frederikshavn to Oftersheim | 563.30 mi (906.54 km) |
| Frederikshavn to Ohrdruf | 456.98 mi (735.43 km) |
| Frederikshavn to Ohringen | 570.98 mi (918.90 km) |
| Frederikshavn to Olbernhau | 481.53 mi (774.94 km) |
| Frederikshavn to Olching | 639.32 mi (1,028.88 km) |
| Frederikshavn to Oldenburg | 310.57 mi (499.81 km) |
| Frederikshavn to Oldenburg in Holstein | 217.44 mi (349.94 km) |
| Frederikshavn to Olfen | 415.03 mi (667.93 km) |
| Frederikshavn to Olpe | 456.99 mi (735.45 km) |
| Frederikshavn to Olsberg | 428.80 mi (690.09 km) |
| Frederikshavn to Oranienburg | 340.92 mi (548.66 km) |
| Frederikshavn to Ortenberg | 493.20 mi (793.72 km) |
| Frederikshavn to Oschatz | 436.66 mi (702.73 km) |
