| Green River to Orangevale (California) | 650.32 mi (1,046.58 km) |
| Green River to Orchards (Washington) | 713.20 mi (1,147.78 km) |
| Green River to Orcutt (California) | 750.22 mi (1,207.36 km) |
| Green River to Oregon (Ohio) | 1,340.62 mi (2,157.51 km) |
| Green River to Oregon (Wisconsin) | 1,029.73 mi (1,657.18 km) |
| Green River to Oregon City (Oregon) | 708.53 mi (1,140.27 km) |
| Green River to Orem (Utah) | 143.46 mi (230.88 km) |
| Green River to Orinda (California) | 719.84 mi (1,158.46 km) |
| Green River to Orland Park (Illinois) | 1,114.27 mi (1,793.24 km) |
| Green River to Orlando (Florida) | 1,817.37 mi (2,924.78 km) |
| Green River to Ormond Beach (Florida) | 1,795.14 mi (2,889.00 km) |
| Green River to Oro Valley (Arizona) | 633.63 mi (1,019.74 km) |
| Green River to Oroville (California) | 649.72 mi (1,045.62 km) |
| Green River to Oshkosh (Wisconsin) | 1,071.65 mi (1,724.65 km) |
| Green River to Oskaloosa (Iowa) | 871.01 mi (1,401.76 km) |
