| Homer Glen to Octeville | 3,974.03 mi (6,395.58 km) |
| Homer Glen to Oignies | 4,125.99 mi (6,640.14 km) |
| Homer Glen to Oissel | 4,091.18 mi (6,584.11 km) |
| Homer Glen to Olivet | 4,174.39 mi (6,718.03 km) |
| Homer Glen to Ollioules | 4,511.71 mi (7,260.89 km) |
| Homer Glen to Olonne-sur-Mer | 4,071.04 mi (6,551.71 km) |
| Homer Glen to Oloron-Sainte-Marie | 4,237.56 mi (6,819.70 km) |
| Homer Glen to Onet Village | 4,329.65 mi (6,967.90 km) |
| Homer Glen to Onnaing | 4,151.81 mi (6,681.70 km) |
| Homer Glen to Orange | 4,429.95 mi (7,129.32 km) |
| Homer Glen to Orchies | 4,135.34 mi (6,655.18 km) |
| Homer Glen to Orleans | 4,173.36 mi (6,716.37 km) |
| Homer Glen to Orly | 4,162.88 mi (6,699.51 km) |
| Homer Glen to Ormesson-sur-Marne | 4,167.11 mi (6,706.32 km) |
| Homer Glen to Orsay | 4,156.42 mi (6,689.12 km) |
