| Pittsburgh to Oak Grove (South Carolina) | 451.07 mi (725.93 km) |
| Pittsburgh to Oak Harbor (Washington) | 2,145.88 mi (3,453.45 km) |
| Pittsburgh to Oak Hills (Oregon) | 2,168.49 mi (3,489.84 km) |
| Pittsburgh to Oak Lawn (Illinois) | 414.34 mi (666.81 km) |
| Pittsburgh to Oak Park (California) | 2,157.08 mi (3,471.49 km) |
| Pittsburgh to Oak Park (Illinois) | 418.39 mi (673.33 km) |
| Pittsburgh to Oak Park (Michigan) | 217.10 mi (349.39 km) |
| Pittsburgh to Oak Ridge (Florida) | 830.87 mi (1,337.15 km) |
| Pittsburgh to Oak Ridge (New Jersey) | 289.71 mi (466.25 km) |
| Pittsburgh to Oak Ridge (Tennessee) | 387.94 mi (624.33 km) |
| Pittsburgh to Oakdale (California) | 2,179.69 mi (3,507.88 km) |
| Pittsburgh to Oakdale (Minnesota) | 729.25 mi (1,173.61 km) |
| Pittsburgh to Oakland (California) | 2,250.24 mi (3,621.41 km) |
| Pittsburgh to Oakland (New Jersey) | 302.99 mi (487.61 km) |
| Pittsburgh to Oakland Park (Florida) | 985.44 mi (1,585.91 km) |
