| Glenmont to Octeville | 3,636.67 mi (5,852.66 km) |
| Glenmont to Oignies | 3,809.77 mi (6,131.23 km) |
| Glenmont to Oissel | 3,758.76 mi (6,049.14 km) |
| Glenmont to Olivet | 3,830.71 mi (6,164.93 km) |
| Glenmont to Ollioules | 4,140.81 mi (6,664.00 km) |
| Glenmont to Olonne-sur-Mer | 3,704.42 mi (5,961.68 km) |
| Glenmont to Oloron-Sainte-Marie | 3,845.70 mi (6,189.06 km) |
| Glenmont to Onet Village | 3,957.76 mi (6,369.40 km) |
| Glenmont to Onnaing | 3,836.58 mi (6,174.39 km) |
| Glenmont to Orange | 4,063.55 mi (6,539.66 km) |
| Glenmont to Orchies | 3,819.89 mi (6,147.52 km) |
| Glenmont to Orleans | 3,830.06 mi (6,163.88 km) |
| Glenmont to Orly | 3,828.73 mi (6,161.74 km) |
| Glenmont to Ormesson-sur-Marne | 3,833.78 mi (6,169.87 km) |
| Glenmont to Orsay | 3,821.23 mi (6,149.68 km) |
