| Flensburg to Oria | 1,056.28 mi (1,699.91 km) |
| Flensburg to Oristano | 1,028.58 mi (1,655.34 km) |
| Flensburg to Orta Nova | 972.55 mi (1,565.16 km) |
| Flensburg to Orte | 861.73 mi (1,386.82 km) |
| Flensburg to Ortona | 887.87 mi (1,428.89 km) |
| Flensburg to Orvieto | 842.21 mi (1,355.40 km) |
| Flensburg to Orzinuovi | 648.60 mi (1,043.81 km) |
| Flensburg to Osimo | 801.46 mi (1,289.83 km) |
| Flensburg to Ospitaletto | 638.11 mi (1,026.94 km) |
| Flensburg to Ostuni | 1,040.15 mi (1,673.95 km) |
| Flensburg to Ottaviano | 989.96 mi (1,593.19 km) |
| Flensburg to Ovada | 701.67 mi (1,129.23 km) |
| Flensburg to Ozieri | 981.12 mi (1,578.96 km) |
| Flensburg to Paceco | 1,169.82 mi (1,882.65 km) |
| Flensburg to Pachino | 1,276.68 mi (2,054.61 km) |
