| Danbury to Octeville | 3,389.21 mi (5,454.41 km) |
| Danbury to Oignies | 3,561.84 mi (5,732.23 km) |
| Danbury to Oissel | 3,511.18 mi (5,650.71 km) |
| Danbury to Olivet | 3,583.58 mi (5,767.22 km) |
| Danbury to Ollioules | 3,895.60 mi (6,269.36 km) |
| Danbury to Olonne-sur-Mer | 3,458.57 mi (5,566.03 km) |
| Danbury to Oloron-Sainte-Marie | 3,602.27 mi (5,797.29 km) |
| Danbury to Onet Village | 3,712.50 mi (5,974.69 km) |
| Danbury to Onnaing | 3,588.65 mi (5,775.38 km) |
| Danbury to Orange | 3,817.93 mi (6,144.36 km) |
| Danbury to Orchies | 3,571.96 mi (5,748.52 km) |
| Danbury to Orleans | 3,582.92 mi (5,766.15 km) |
| Danbury to Orly | 3,581.23 mi (5,763.43 km) |
| Danbury to Ormesson-sur-Marne | 3,586.26 mi (5,771.53 km) |
| Danbury to Orsay | 3,573.77 mi (5,751.42 km) |
