| Klamath Falls to Oswego (Illinois) | 1,707.53 mi (2,748.01 km) |
| Klamath Falls to Oswego (New York) | 2,266.94 mi (3,648.29 km) |
| Klamath Falls to Otsego (Minnesota) | 1,413.72 mi (2,275.15 km) |
| Klamath Falls to Ottawa (Illinois) | 1,687.90 mi (2,716.42 km) |
| Klamath Falls to Ottawa (Kansas) | 1,411.09 mi (2,270.94 km) |
| Klamath Falls to Ottumwa (Iowa) | 1,511.11 mi (2,431.90 km) |
| Klamath Falls to Overland (Missouri) | 1,659.37 mi (2,670.50 km) |
| Klamath Falls to Overland Park (Kansas) | 1,434.36 mi (2,308.38 km) |
| Klamath Falls to Overlea (Maryland) | 2,347.79 mi (3,778.40 km) |
| Klamath Falls to Oviedo (Florida) | 2,441.53 mi (3,929.26 km) |
| Klamath Falls to Owasso (Oklahoma) | 1,440.93 mi (2,318.95 km) |
| Klamath Falls to Owatonna (Minnesota) | 1,437.29 mi (2,313.09 km) |
| Klamath Falls to Owensboro (Kentucky) | 1,847.39 mi (2,973.08 km) |
| Klamath Falls to Owings Mills (Maryland) | 2,332.92 mi (3,754.48 km) |
| Klamath Falls to Owosso (Michigan) | 1,896.70 mi (3,052.45 km) |
