| Highgate to Orangevale (California) | 5,261.96 mi (8,468.30 km) |
| Highgate to Orchards (Washington) | 4,895.41 mi (7,878.41 km) |
| Highgate to Orcutt (California) | 5,458.58 mi (8,784.74 km) |
| Highgate to Oregon (Ohio) | 3,793.58 mi (6,105.18 km) |
| Highgate to Oregon (Wisconsin) | 3,962.42 mi (6,376.91 km) |
| Highgate to Oregon City (Oregon) | 4,917.03 mi (7,913.20 km) |
| Highgate to Orem (Utah) | 4,876.52 mi (7,848.01 km) |
| Highgate to Orinda (California) | 5,337.03 mi (8,589.12 km) |
| Highgate to Orland Park (Illinois) | 3,966.29 mi (6,383.13 km) |
| Highgate to Orlando (Florida) | 4,338.69 mi (6,982.44 km) |
| Highgate to Ormond Beach (Florida) | 4,287.89 mi (6,900.70 km) |
| Highgate to Oro Valley (Arizona) | 5,285.76 mi (8,506.61 km) |
| Highgate to Oroville (California) | 5,225.10 mi (8,408.98 km) |
| Highgate to Oshkosh (Wisconsin) | 3,880.86 mi (6,245.64 km) |
| Highgate to Oskaloosa (Iowa) | 4,161.02 mi (6,696.52 km) |
