| Gaeta to Octeville | 936.00 mi (1,506.35 km) |
| Gaeta to Oignies | 815.44 mi (1,312.32 km) |
| Gaeta to Oissel | 824.50 mi (1,326.90 km) |
| Gaeta to Olivet | 734.16 mi (1,181.52 km) |
| Gaeta to Ollioules | 416.81 mi (670.79 km) |
| Gaeta to Olonne-sur-Mer | 845.87 mi (1,361.29 km) |
| Gaeta to Oloron-Sainte-Marie | 737.21 mi (1,186.42 km) |
| Gaeta to Onet Village | 596.80 mi (960.45 km) |
| Gaeta to Onnaing | 793.55 mi (1,277.10 km) |
| Gaeta to Orange | 488.14 mi (785.59 km) |
| Gaeta to Orchies | 808.34 mi (1,300.89 km) |
| Gaeta to Orleans | 735.35 mi (1,183.44 km) |
| Gaeta to Orly | 752.68 mi (1,211.32 km) |
| Gaeta to Ormesson-sur-Marne | 749.44 mi (1,206.11 km) |
| Gaeta to Orsay | 757.94 mi (1,219.78 km) |
