| Green River to Oswego (Illinois) | 1,089.29 mi (1,753.04 km) |
| Green River to Oswego (New York) | 1,674.37 mi (2,694.63 km) |
| Green River to Otsego (Minnesota) | 835.42 mi (1,344.48 km) |
| Green River to Ottawa (Illinois) | 1,066.92 mi (1,717.04 km) |
| Green River to Ottawa (Kansas) | 776.83 mi (1,250.19 km) |
| Green River to Ottumwa (Iowa) | 884.82 mi (1,423.99 km) |
| Green River to Overland (Missouri) | 1,025.85 mi (1,650.94 km) |
| Green River to Overland Park (Kansas) | 799.92 mi (1,287.35 km) |
| Green River to Overlea (Maryland) | 1,728.76 mi (2,782.18 km) |
| Green River to Oviedo (Florida) | 1,817.12 mi (2,924.38 km) |
| Green River to Owasso (Oklahoma) | 816.18 mi (1,313.51 km) |
| Green River to Owatonna (Minnesota) | 840.83 mi (1,353.18 km) |
| Green River to Owensboro (Kentucky) | 1,213.76 mi (1,953.36 km) |
| Green River to Owings Mills (Maryland) | 1,713.80 mi (2,758.10 km) |
| Green River to Owosso (Michigan) | 1,292.75 mi (2,080.48 km) |
