| Antrim to Octeville | 401.15 mi (645.58 km) |
| Antrim to Oignies | 484.36 mi (779.51 km) |
| Antrim to Oissel | 483.38 mi (777.93 km) |
| Antrim to Olivet | 588.17 mi (946.58 km) |
| Antrim to Ollioules | 966.22 mi (1,554.98 km) |
| Antrim to Olonne-sur-Mer | 597.42 mi (961.46 km) |
| Antrim to Oloron-Sainte-Marie | 835.04 mi (1,343.87 km) |
| Antrim to Onet Village | 815.38 mi (1,312.22 km) |
| Antrim to Onnaing | 508.29 mi (818.01 km) |
| Antrim to Orange | 880.52 mi (1,417.06 km) |
| Antrim to Orchies | 492.50 mi (792.60 km) |
| Antrim to Orleans | 586.16 mi (943.34 km) |
| Antrim to Orly | 552.14 mi (888.58 km) |
| Antrim to Ormesson-sur-Marne | 554.02 mi (891.62 km) |
| Antrim to Orsay | 548.87 mi (883.32 km) |
