| Healdsburg to Oberkirch | 5,707.62 mi (9,185.52 km) |
| Healdsburg to Obernburg am Main | 5,662.99 mi (9,113.71 km) |
| Healdsburg to Obernkirchen | 5,526.78 mi (8,894.50 km) |
| Healdsburg to Oberschleissheim | 5,815.97 mi (9,359.90 km) |
| Healdsburg to Oberstdorf | 5,829.95 mi (9,382.40 km) |
| Healdsburg to Obertraubling | 5,790.23 mi (9,318.48 km) |
| Healdsburg to Obertshausen | 5,642.27 mi (9,080.36 km) |
| Healdsburg to Oberursel | 5,627.95 mi (9,057.30 km) |
| Healdsburg to Ochsenfurt | 5,697.70 mi (9,169.56 km) |
| Healdsburg to Ochsenhausen | 5,783.65 mi (9,307.88 km) |
| Healdsburg to Ochtrup | 5,481.28 mi (8,821.26 km) |
| Healdsburg to Odenthal | 5,543.67 mi (8,921.67 km) |
| Healdsburg to Oelde | 5,526.42 mi (8,893.91 km) |
| Healdsburg to Oelsnitz | 5,706.91 mi (9,184.38 km) |
| Healdsburg to Oer-Erkenschwick | 5,513.76 mi (8,873.53 km) |
