| Harborne to Odessa (Texas) | 4,906.22 mi (7,895.81 km) |
| Harborne to Ogden (Utah) | 4,736.25 mi (7,622.25 km) |
| Harborne to Oildale (California) | 5,284.86 mi (8,505.17 km) |
| Harborne to Ojus (Florida) | 4,330.64 mi (6,969.50 km) |
| Harborne to Okemos (Michigan) | 3,688.15 mi (5,935.50 km) |
| Harborne to Oklahoma City (Oklahoma) | 4,537.41 mi (7,302.26 km) |
| Harborne to Okmulgee (Oklahoma) | 4,473.27 mi (7,199.03 km) |
| Harborne to Olathe (Kansas) | 4,263.45 mi (6,861.36 km) |
| Harborne to Old Jamestown (Missouri) | 4,094.81 mi (6,589.96 km) |
| Harborne to Oldsmar (Florida) | 4,327.95 mi (6,965.16 km) |
| Harborne to Olean (New York) | 3,483.86 mi (5,606.72 km) |
| Harborne to Olive Branch (Mississippi) | 4,269.35 mi (6,870.85 km) |
| Harborne to Olivehurst (California) | 5,151.79 mi (8,291.01 km) |
| Harborne to Olney (Maryland) | 3,561.34 mi (5,731.42 km) |
| Harborne to Olympia (Washington) | 4,731.69 mi (7,614.93 km) |
