| Johnstown to Orangevale (California) | 2,236.31 mi (3,598.99 km) |
| Johnstown to Orchards (Washington) | 2,206.44 mi (3,550.92 km) |
| Johnstown to Orcutt (California) | 2,281.90 mi (3,672.36 km) |
| Johnstown to Oregon (Ohio) | 252.53 mi (406.40 km) |
| Johnstown to Oregon (Wisconsin) | 569.32 mi (916.23 km) |
| Johnstown to Oregon City (Oregon) | 2,212.12 mi (3,560.07 km) |
| Johnstown to Orem (Utah) | 1,717.01 mi (2,763.27 km) |
| Johnstown to Orinda (California) | 2,302.51 mi (3,705.52 km) |
| Johnstown to Orland Park (Illinois) | 474.64 mi (763.86 km) |
| Johnstown to Orlando (Florida) | 830.09 mi (1,335.90 km) |
| Johnstown to Ormond Beach (Florida) | 771.84 mi (1,242.16 km) |
| Johnstown to Oro Valley (Arizona) | 1,853.62 mi (2,983.11 km) |
| Johnstown to Oroville (California) | 2,238.50 mi (3,602.52 km) |
| Johnstown to Oshkosh (Wisconsin) | 555.40 mi (893.84 km) |
| Johnstown to Oskaloosa (Iowa) | 719.89 mi (1,158.56 km) |
