| Highgate to Oakley (California) | 5,316.23 mi (8,555.65 km) |
| Highgate to Oakton (Virginia) | 3,674.13 mi (5,912.94 km) |
| Highgate to Oakville (Missouri) | 4,211.01 mi (6,776.96 km) |
| Highgate to Oatfield (Oregon) | 4,913.01 mi (7,906.72 km) |
| Highgate to Ocala (Florida) | 4,337.78 mi (6,980.98 km) |
| Highgate to Ocean Acres (New Jersey) | 3,512.67 mi (5,653.09 km) |
| Highgate to Ocean City (New Jersey) | 3,546.82 mi (5,708.06 km) |
| Highgate to Ocean Pines (Maryland) | 3,608.70 mi (5,807.64 km) |
| Highgate to Ocean Pointe (Hawaii) | 7,225.53 mi (11,628.36 km) |
| Highgate to Ocean Springs (Mississippi) | 4,549.36 mi (7,321.49 km) |
| Highgate to Oceanside (California) | 5,454.09 mi (8,777.51 km) |
| Highgate to Oceanside (New York) | 3,447.47 mi (5,548.17 km) |
| Highgate to Ocoee (Florida) | 4,341.80 mi (6,987.46 km) |
| Highgate to Oconomowoc (Wisconsin) | 3,920.87 mi (6,310.03 km) |
| Highgate to Odenton (Maryland) | 3,641.38 mi (5,860.24 km) |
