| Blackburn to Oakley (California) | 5,140.39 mi (8,272.66 km) |
| Blackburn to Oakton (Virginia) | 3,536.54 mi (5,691.51 km) |
| Blackburn to Oakville (Missouri) | 4,058.60 mi (6,531.69 km) |
| Blackburn to Oatfield (Oregon) | 4,734.78 mi (7,619.89 km) |
| Blackburn to Ocala (Florida) | 4,210.47 mi (6,776.10 km) |
| Blackburn to Ocean Acres (New Jersey) | 3,377.43 mi (5,435.44 km) |
| Blackburn to Ocean City (New Jersey) | 3,412.11 mi (5,491.26 km) |
| Blackburn to Ocean Pines (Maryland) | 3,475.01 mi (5,592.50 km) |
| Blackburn to Ocean Pointe (Hawaii) | 7,049.29 mi (11,344.74 km) |
| Blackburn to Ocean Springs (Mississippi) | 4,410.16 mi (7,097.46 km) |
| Blackburn to Oceanside (California) | 5,282.72 mi (8,501.71 km) |
| Blackburn to Oceanside (New York) | 3,311.26 mi (5,328.95 km) |
| Blackburn to Ocoee (Florida) | 4,216.52 mi (6,785.84 km) |
| Blackburn to Oconomowoc (Wisconsin) | 3,764.01 mi (6,057.59 km) |
| Blackburn to Odenton (Maryland) | 3,504.25 mi (5,639.55 km) |
