| Healdsburg to Norwich | 5,300.52 mi (8,530.36 km) |
| Healdsburg to Nottingham | 5,215.04 mi (8,392.79 km) |
| Healdsburg to Nuneaton | 5,227.48 mi (8,412.82 km) |
| Healdsburg to Oadby | 5,234.98 mi (8,424.88 km) |
| Healdsburg to Oakengates | 5,190.34 mi (8,353.05 km) |
| Healdsburg to Oakham | 5,241.19 mi (8,434.88 km) |
| Healdsburg to Oldbury | 5,212.47 mi (8,388.66 km) |
| Healdsburg to Oldham | 5,157.89 mi (8,300.83 km) |
| Healdsburg to Ollerton | 5,206.34 mi (8,378.80 km) |
| Healdsburg to Olton | 5,221.95 mi (8,403.91 km) |
| Healdsburg to Omagh | 4,956.86 mi (7,977.29 km) |
| Healdsburg to Ormesby | 5,134.18 mi (8,262.66 km) |
| Healdsburg to Ormskirk | 5,134.69 mi (8,263.49 km) |
| Healdsburg to Orpington | 5,331.05 mi (8,579.49 km) |
| Healdsburg to Ossett | 5,166.42 mi (8,314.56 km) |
