| Healdsburg to Odessa (Texas) | 1,244.55 mi (2,002.91 km) |
| Healdsburg to Ogden (Utah) | 604.31 mi (972.55 km) |
| Healdsburg to Oildale (California) | 305.58 mi (491.78 km) |
| Healdsburg to Ojus (Florida) | 2,616.52 mi (4,210.87 km) |
| Healdsburg to Okemos (Michigan) | 2,017.26 mi (3,246.47 km) |
| Healdsburg to Oklahoma City (Oklahoma) | 1,410.35 mi (2,269.75 km) |
| Healdsburg to Okmulgee (Oklahoma) | 1,488.87 mi (2,396.11 km) |
| Healdsburg to Olathe (Kansas) | 1,505.26 mi (2,422.48 km) |
| Healdsburg to Old Jamestown (Missouri) | 1,746.69 mi (2,811.02 km) |
| Healdsburg to Oldsmar (Florida) | 2,411.03 mi (3,880.18 km) |
| Healdsburg to Olean (New York) | 2,325.40 mi (3,742.38 km) |
| Healdsburg to Olive Branch (Mississippi) | 1,834.37 mi (2,952.14 km) |
| Healdsburg to Olivehurst (California) | 77.17 mi (124.19 km) |
| Healdsburg to Olney (Maryland) | 2,436.39 mi (3,921.00 km) |
| Healdsburg to Olympia (Washington) | 581.72 mi (936.19 km) |
