| Tallaght to Octeville | 324.19 mi (521.74 km) |
| Tallaght to Oignies | 443.41 mi (713.60 km) |
| Tallaght to Oissel | 421.32 mi (678.05 km) |
| Tallaght to Olivet | 520.67 mi (837.94 km) |
| Tallaght to Ollioules | 896.02 mi (1,442.01 km) |
| Tallaght to Olonne-sur-Mer | 508.93 mi (819.05 km) |
| Tallaght to Oloron-Sainte-Marie | 745.36 mi (1,199.55 km) |
| Tallaght to Onet Village | 737.58 mi (1,187.01 km) |
| Tallaght to Onnaing | 469.36 mi (755.36 km) |
| Tallaght to Orange | 809.77 mi (1,303.19 km) |
| Tallaght to Orchies | 452.83 mi (728.76 km) |
| Tallaght to Orleans | 518.91 mi (835.11 km) |
| Tallaght to Orly | 492.61 mi (792.77 km) |
| Tallaght to Ormesson-sur-Marne | 495.53 mi (797.48 km) |
| Tallaght to Orsay | 487.97 mi (785.31 km) |
