| Johnstown to Oak Harbor (Washington) | 2,198.27 mi (3,537.77 km) |
| Johnstown to Oak Hills (Oregon) | 2,222.51 mi (3,576.78 km) |
| Johnstown to Oak Lawn (Illinois) | 470.13 mi (756.60 km) |
| Johnstown to Oak Park (California) | 2,212.89 mi (3,561.30 km) |
| Johnstown to Oak Park (Illinois) | 474.00 mi (762.82 km) |
| Johnstown to Oak Park (Michigan) | 265.77 mi (427.71 km) |
| Johnstown to Oak Ridge (Florida) | 831.16 mi (1,337.63 km) |
| Johnstown to Oak Ridge (New Jersey) | 236.78 mi (381.05 km) |
| Johnstown to Oak Ridge (Tennessee) | 419.50 mi (675.12 km) |
| Johnstown to Oakdale (California) | 2,235.86 mi (3,598.27 km) |
| Johnstown to Oakdale (Minnesota) | 781.58 mi (1,257.83 km) |
| Johnstown to Oakland (California) | 2,306.39 mi (3,711.78 km) |
| Johnstown to Oakland (New Jersey) | 249.92 mi (402.20 km) |
| Johnstown to Oakland Park (Florida) | 980.10 mi (1,577.31 km) |
| Johnstown to Oakleaf Plantation (Florida) | 720.67 mi (1,159.81 km) |
