| Frederikshavn to Oria | 1,212.41 mi (1,951.18 km) |
| Frederikshavn to Oristano | 1,214.68 mi (1,954.83 km) |
| Frederikshavn to Orta Nova | 1,136.39 mi (1,828.85 km) |
| Frederikshavn to Orte | 1,038.24 mi (1,670.88 km) |
| Frederikshavn to Ortona | 1,056.36 mi (1,700.05 km) |
| Frederikshavn to Orvieto | 1,019.57 mi (1,640.84 km) |
| Frederikshavn to Orzinuovi | 832.35 mi (1,339.53 km) |
| Frederikshavn to Osimo | 972.84 mi (1,565.63 km) |
| Frederikshavn to Ospitaletto | 821.46 mi (1,322.01 km) |
| Frederikshavn to Ostuni | 1,196.11 mi (1,924.95 km) |
| Frederikshavn to Ottaviano | 1,159.61 mi (1,866.22 km) |
| Frederikshavn to Ovada | 888.22 mi (1,429.46 km) |
| Frederikshavn to Ozieri | 1,166.63 mi (1,877.51 km) |
| Frederikshavn to Paceco | 1,347.51 mi (2,168.61 km) |
| Frederikshavn to Pachino | 1,447.15 mi (2,328.96 km) |
