| Glencullen to Octeville | 316.96 mi (510.10 km) |
| Glencullen to Oignies | 436.29 mi (702.15 km) |
| Glencullen to Oissel | 413.93 mi (666.16 km) |
| Glencullen to Olivet | 513.31 mi (826.09 km) |
| Glencullen to Ollioules | 888.72 mi (1,430.26 km) |
| Glencullen to Olonne-sur-Mer | 502.35 mi (808.45 km) |
| Glencullen to Oloron-Sainte-Marie | 738.93 mi (1,189.19 km) |
| Glencullen to Onet Village | 730.45 mi (1,175.55 km) |
| Glencullen to Onnaing | 462.28 mi (743.96 km) |
| Glencullen to Orange | 802.47 mi (1,291.45 km) |
| Glencullen to Orchies | 445.74 mi (717.34 km) |
| Glencullen to Orleans | 511.55 mi (823.26 km) |
| Glencullen to Orly | 485.22 mi (780.89 km) |
| Glencullen to Ormesson-sur-Marne | 488.15 mi (785.60 km) |
| Glencullen to Orsay | 480.58 mi (773.42 km) |
