| Northbrook to Octeville | 3,946.28 mi (6,350.92 km) |
| Northbrook to Oignies | 4,097.19 mi (6,593.79 km) |
| Northbrook to Oissel | 4,063.13 mi (6,538.97 km) |
| Northbrook to Olivet | 4,146.82 mi (6,673.67 km) |
| Northbrook to Ollioules | 4,485.35 mi (7,218.47 km) |
| Northbrook to Olonne-sur-Mer | 4,044.70 mi (6,509.31 km) |
| Northbrook to Oloron-Sainte-Marie | 4,212.51 mi (6,779.38 km) |
| Northbrook to Onet Village | 4,303.44 mi (6,925.72 km) |
| Northbrook to Onnaing | 4,122.96 mi (6,635.26 km) |
| Northbrook to Orange | 4,403.40 mi (7,086.59 km) |
| Northbrook to Orchies | 4,106.50 mi (6,608.77 km) |
| Northbrook to Orleans | 4,145.78 mi (6,671.99 km) |
| Northbrook to Orly | 4,134.87 mi (6,654.43 km) |
| Northbrook to Ormesson-sur-Marne | 4,139.06 mi (6,661.18 km) |
| Northbrook to Orsay | 4,128.47 mi (6,644.13 km) |
