| Healdsburg to Octeville | 5,367.86 mi (8,638.74 km) |
| Healdsburg to Oignies | 5,461.13 mi (8,788.84 km) |
| Healdsburg to Oissel | 5,464.92 mi (8,794.94 km) |
| Healdsburg to Olivet | 5,566.29 mi (8,958.07 km) |
| Healdsburg to Ollioules | 5,940.01 mi (9,559.52 km) |
| Healdsburg to Olonne-sur-Mer | 5,520.04 mi (8,883.64 km) |
| Healdsburg to Oloron-Sainte-Marie | 5,729.31 mi (9,220.44 km) |
| Healdsburg to Onet Village | 5,772.33 mi (9,289.67 km) |
| Healdsburg to Onnaing | 5,482.53 mi (8,823.28 km) |
| Healdsburg to Orange | 5,853.70 mi (9,420.61 km) |
| Healdsburg to Orchies | 5,467.94 mi (8,799.80 km) |
| Healdsburg to Orleans | 5,564.51 mi (8,955.22 km) |
| Healdsburg to Orly | 5,534.72 mi (8,907.27 km) |
| Healdsburg to Ormesson-sur-Marne | 5,536.80 mi (8,910.61 km) |
| Healdsburg to Orsay | 5,531.06 mi (8,901.38 km) |
