| Delfzijl to Octeville | 448.13 mi (721.20 km) |
| Delfzijl to Oignies | 259.02 mi (416.85 km) |
| Delfzijl to Oissel | 372.96 mi (600.23 km) |
| Delfzijl to Olivet | 437.02 mi (703.31 km) |
| Delfzijl to Ollioules | 706.03 mi (1,136.24 km) |
| Delfzijl to Olonne-sur-Mer | 607.30 mi (977.36 km) |
| Delfzijl to Oloron-Sainte-Marie | 780.33 mi (1,255.82 km) |
| Delfzijl to Onet Village | 649.73 mi (1,045.64 km) |
| Delfzijl to Onnaing | 247.87 mi (398.91 km) |
| Delfzijl to Orange | 642.45 mi (1,033.93 km) |
| Delfzijl to Orchies | 251.96 mi (405.49 km) |
| Delfzijl to Orleans | 434.49 mi (699.24 km) |
| Delfzijl to Orly | 372.90 mi (600.12 km) |
| Delfzijl to Ormesson-sur-Marne | 367.09 mi (590.78 km) |
| Delfzijl to Orsay | 380.37 mi (612.15 km) |
