| Grays to Orangevale (California) | 5,280.82 mi (8,498.66 km) |
| Grays to Orchards (Washington) | 4,913.34 mi (7,907.26 km) |
| Grays to Orcutt (California) | 5,477.91 mi (8,815.84 km) |
| Grays to Oregon (Ohio) | 3,814.90 mi (6,139.49 km) |
| Grays to Oregon (Wisconsin) | 3,983.46 mi (6,410.76 km) |
| Grays to Oregon City (Oregon) | 4,934.99 mi (7,942.10 km) |
| Grays to Orem (Utah) | 4,896.25 mi (7,879.75 km) |
| Grays to Orinda (California) | 5,355.86 mi (8,619.42 km) |
| Grays to Orland Park (Illinois) | 3,987.47 mi (6,417.21 km) |
| Grays to Orlando (Florida) | 4,360.06 mi (7,016.84 km) |
| Grays to Ormond Beach (Florida) | 4,309.29 mi (6,935.12 km) |
| Grays to Oro Valley (Arizona) | 5,306.20 mi (8,539.50 km) |
| Grays to Oroville (California) | 5,243.84 mi (8,439.14 km) |
| Grays to Oshkosh (Wisconsin) | 3,901.85 mi (6,279.43 km) |
| Grays to Oskaloosa (Iowa) | 4,182.02 mi (6,730.30 km) |
