| Ennis to Octeville | 387.30 mi (623.30 km) |
| Ennis to Oignies | 538.14 mi (866.05 km) |
| Ennis to Oissel | 499.02 mi (803.09 km) |
| Ennis to Olivet | 589.42 mi (948.58 km) |
| Ennis to Ollioules | 955.58 mi (1,537.86 km) |
| Ennis to Olonne-sur-Mer | 541.54 mi (871.52 km) |
| Ennis to Oloron-Sainte-Marie | 769.87 mi (1,238.99 km) |
| Ennis to Onet Village | 787.37 mi (1,267.15 km) |
| Ennis to Onnaing | 564.88 mi (909.09 km) |
| Ennis to Orange | 869.45 mi (1,399.25 km) |
| Ennis to Orchies | 548.19 mi (882.23 km) |
| Ennis to Orleans | 588.02 mi (946.32 km) |
| Ennis to Orly | 570.97 mi (918.89 km) |
| Ennis to Ormesson-sur-Marne | 574.87 mi (925.16 km) |
| Ennis to Orsay | 565.03 mi (909.33 km) |
