| Oak Forest to Octeville | 3,966.18 mi (6,382.95 km) |
| Oak Forest to Oignies | 4,118.44 mi (6,627.98 km) |
| Oak Forest to Oissel | 4,083.41 mi (6,571.61 km) |
| Oak Forest to Olivet | 4,166.48 mi (6,705.31 km) |
| Oak Forest to Ollioules | 4,503.50 mi (7,247.68 km) |
| Oak Forest to Olonne-sur-Mer | 4,062.84 mi (6,538.50 km) |
| Oak Forest to Oloron-Sainte-Marie | 4,229.07 mi (6,806.02 km) |
| Oak Forest to Onet Village | 4,321.41 mi (6,954.64 km) |
| Oak Forest to Onnaing | 4,144.28 mi (6,669.57 km) |
| Oak Forest to Orange | 4,421.79 mi (7,116.19 km) |
| Oak Forest to Orchies | 4,127.79 mi (6,643.04 km) |
| Oak Forest to Orleans | 4,165.46 mi (6,703.66 km) |
| Oak Forest to Orly | 4,155.10 mi (6,686.98 km) |
| Oak Forest to Ormesson-sur-Marne | 4,159.34 mi (6,693.81 km) |
| Oak Forest to Orsay | 4,148.63 mi (6,676.57 km) |
