| Longmont to Octeville | 4,691.44 mi (7,550.14 km) |
| Longmont to Oignies | 4,817.86 mi (7,753.59 km) |
| Longmont to Oissel | 4,800.76 mi (7,726.07 km) |
| Longmont to Olivet | 4,893.62 mi (7,875.53 km) |
| Longmont to Ollioules | 5,251.93 mi (8,452.17 km) |
| Longmont to Olonne-sur-Mer | 4,815.53 mi (7,749.85 km) |
| Longmont to Oloron-Sainte-Marie | 5,003.54 mi (8,052.42 km) |
| Longmont to Onet Village | 5,074.30 mi (8,166.29 km) |
| Longmont to Onnaing | 4,841.97 mi (7,792.40 km) |
| Longmont to Orange | 5,167.13 mi (8,315.70 km) |
| Longmont to Orchies | 4,826.14 mi (7,766.92 km) |
| Longmont to Orleans | 4,892.23 mi (7,873.29 km) |
| Longmont to Orly | 4,872.57 mi (7,841.65 km) |
| Longmont to Ormesson-sur-Marne | 4,875.85 mi (7,846.93 km) |
| Longmont to Orsay | 4,867.34 mi (7,833.22 km) |
