| Keystone to Orangevale (California) | 2,324.37 mi (3,740.71 km) |
| Keystone to Orchards (Washington) | 2,482.30 mi (3,994.88 km) |
| Keystone to Orcutt (California) | 2,262.44 mi (3,641.04 km) |
| Keystone to Oregon (Ohio) | 935.40 mi (1,505.38 km) |
| Keystone to Oregon (Wisconsin) | 1,090.17 mi (1,754.46 km) |
| Keystone to Oregon City (Oregon) | 2,478.98 mi (3,989.53 km) |
| Keystone to Orem (Utah) | 1,851.22 mi (2,979.25 km) |
| Keystone to Orinda (California) | 2,370.70 mi (3,815.27 km) |
| Keystone to Orland Park (Illinois) | 977.21 mi (1,572.66 km) |
| Keystone to Orlando (Florida) | 80.46 mi (129.49 km) |
| Keystone to Ormond Beach (Florida) | 121.45 mi (195.45 km) |
| Keystone to Oro Valley (Arizona) | 1,713.77 mi (2,758.04 km) |
| Keystone to Oroville (California) | 2,349.40 mi (3,780.99 km) |
| Keystone to Oshkosh (Wisconsin) | 1,146.54 mi (1,845.18 km) |
| Keystone to Oskaloosa (Iowa) | 1,071.60 mi (1,724.57 km) |
