| Fredericia to Oria | 1,101.19 mi (1,772.20 km) |
| Fredericia to Oristano | 1,083.36 mi (1,743.50 km) |
| Fredericia to Orta Nova | 1,019.91 mi (1,641.39 km) |
| Fredericia to Orte | 913.24 mi (1,469.72 km) |
| Fredericia to Ortona | 936.70 mi (1,507.48 km) |
| Fredericia to Orvieto | 893.99 mi (1,438.74 km) |
| Fredericia to Orzinuovi | 702.50 mi (1,130.56 km) |
| Fredericia to Osimo | 851.19 mi (1,369.86 km) |
| Fredericia to Ospitaletto | 691.86 mi (1,113.45 km) |
| Fredericia to Ostuni | 1,084.99 mi (1,746.13 km) |
| Fredericia to Ottaviano | 1,039.26 mi (1,672.53 km) |
| Fredericia to Ovada | 756.57 mi (1,217.59 km) |
| Fredericia to Ozieri | 1,035.70 mi (1,666.80 km) |
| Fredericia to Paceco | 1,221.85 mi (1,966.38 km) |
| Fredericia to Pachino | 1,326.39 mi (2,134.62 km) |
