| Horsforth to Oakley (California) | 5,160.40 mi (8,304.86 km) |
| Horsforth to Oakton (Virginia) | 3,567.85 mi (5,741.90 km) |
| Horsforth to Oakville (Missouri) | 4,087.39 mi (6,578.03 km) |
| Horsforth to Oatfield (Oregon) | 4,752.33 mi (7,648.14 km) |
| Horsforth to Ocala (Florida) | 4,242.92 mi (6,828.32 km) |
| Horsforth to Ocean Acres (New Jersey) | 3,409.06 mi (5,486.35 km) |
| Horsforth to Ocean City (New Jersey) | 3,443.81 mi (5,542.27 km) |
| Horsforth to Ocean Pines (Maryland) | 3,506.83 mi (5,643.69 km) |
| Horsforth to Ocean Pointe (Hawaii) | 7,056.91 mi (11,357.00 km) |
| Horsforth to Ocean Springs (Mississippi) | 4,441.17 mi (7,147.38 km) |
| Horsforth to Oceanside (California) | 5,305.49 mi (8,538.35 km) |
| Horsforth to Oceanside (New York) | 3,342.78 mi (5,379.68 km) |
| Horsforth to Ocoee (Florida) | 4,249.16 mi (6,838.37 km) |
| Horsforth to Oconomowoc (Wisconsin) | 3,791.83 mi (6,102.36 km) |
| Horsforth to Odenton (Maryland) | 3,535.63 mi (5,690.05 km) |
