| Forest Lake to Octeville | 4,004.15 mi (6,444.06 km) |
| Forest Lake to Oignies | 4,139.53 mi (6,661.93 km) |
| Forest Lake to Oissel | 4,116.29 mi (6,624.53 km) |
| Forest Lake to Olivet | 4,206.27 mi (6,769.33 km) |
| Forest Lake to Ollioules | 4,558.99 mi (7,336.98 km) |
| Forest Lake to Olonne-sur-Mer | 4,120.54 mi (6,631.37 km) |
| Forest Lake to Oloron-Sainte-Marie | 4,303.47 mi (6,925.76 km) |
| Forest Lake to Onet Village | 4,379.77 mi (7,048.55 km) |
| Forest Lake to Onnaing | 4,164.33 mi (6,701.84 km) |
| Forest Lake to Orange | 4,474.91 mi (7,201.67 km) |
| Forest Lake to Orchies | 4,148.22 mi (6,675.91 km) |
| Forest Lake to Orleans | 4,204.99 mi (6,767.28 km) |
| Forest Lake to Orly | 4,188.26 mi (6,740.36 km) |
| Forest Lake to Ormesson-sur-Marne | 4,191.87 mi (6,746.16 km) |
| Forest Lake to Orsay | 4,182.61 mi (6,731.26 km) |
