| Klamath Falls to Orangevale (California) | 245.73 mi (395.46 km) |
| Klamath Falls to Orchards (Washington) | 242.64 mi (390.49 km) |
| Klamath Falls to Orcutt (California) | 513.08 mi (825.72 km) |
| Klamath Falls to Oregon (Ohio) | 1,954.34 mi (3,145.20 km) |
| Klamath Falls to Oregon (Wisconsin) | 1,638.36 mi (2,636.69 km) |
| Klamath Falls to Oregon City (Oregon) | 219.54 mi (353.32 km) |
| Klamath Falls to Orem (Utah) | 539.56 mi (868.34 km) |
| Klamath Falls to Orinda (California) | 300.53 mi (483.66 km) |
| Klamath Falls to Orland Park (Illinois) | 1,732.63 mi (2,788.39 km) |
| Klamath Falls to Orlando (Florida) | 2,440.89 mi (3,928.24 km) |
| Klamath Falls to Ormond Beach (Florida) | 2,421.64 mi (3,897.25 km) |
| Klamath Falls to Oro Valley (Arizona) | 898.72 mi (1,446.35 km) |
| Klamath Falls to Oroville (California) | 188.23 mi (302.93 km) |
| Klamath Falls to Oshkosh (Wisconsin) | 1,668.29 mi (2,684.86 km) |
| Klamath Falls to Oskaloosa (Iowa) | 1,495.75 mi (2,407.18 km) |
