| Horsforth to Orangevale (California) | 5,106.05 mi (8,217.40 km) |
| Horsforth to Orchards (Washington) | 4,734.63 mi (7,619.65 km) |
| Horsforth to Orcutt (California) | 5,305.85 mi (8,538.94 km) |
| Horsforth to Oregon (Ohio) | 3,673.23 mi (5,911.49 km) |
| Horsforth to Oregon (Wisconsin) | 3,832.65 mi (6,168.06 km) |
| Horsforth to Oregon City (Oregon) | 4,756.39 mi (7,654.68 km) |
| Horsforth to Orem (Utah) | 4,727.29 mi (7,607.84 km) |
| Horsforth to Orinda (California) | 5,180.90 mi (8,337.85 km) |
| Horsforth to Orland Park (Illinois) | 3,840.52 mi (6,180.72 km) |
| Horsforth to Orlando (Florida) | 4,246.60 mi (6,834.24 km) |
| Horsforth to Ormond Beach (Florida) | 4,194.67 mi (6,750.67 km) |
| Horsforth to Oro Valley (Arizona) | 5,144.59 mi (8,279.42 km) |
| Horsforth to Oroville (California) | 5,068.44 mi (8,156.86 km) |
| Horsforth to Oshkosh (Wisconsin) | 3,750.20 mi (6,035.36 km) |
| Horsforth to Oskaloosa (Iowa) | 4,030.12 mi (6,485.85 km) |
