| Gilching to Octeville | 596.77 mi (960.41 km) |
| Gilching to Oignies | 408.02 mi (656.65 km) |
| Gilching to Oissel | 472.67 mi (760.69 km) |
| Gilching to Olivet | 434.78 mi (699.71 km) |
| Gilching to Ollioules | 432.68 mi (696.33 km) |
| Gilching to Olonne-sur-Mer | 621.12 mi (999.59 km) |
| Gilching to Oloron-Sainte-Marie | 666.84 mi (1,073.18 km) |
| Gilching to Onet Village | 489.56 mi (787.87 km) |
| Gilching to Onnaing | 381.16 mi (613.41 km) |
| Gilching to Orange | 414.41 mi (666.92 km) |
| Gilching to Orchies | 397.85 mi (640.28 km) |
| Gilching to Orleans | 434.13 mi (698.67 km) |
| Gilching to Orly | 410.53 mi (660.69 km) |
| Gilching to Ormesson-sur-Marne | 404.07 mi (650.29 km) |
| Gilching to Orsay | 419.75 mi (675.52 km) |
