| Klamath Falls to Odessa (Texas) | 1,282.94 mi (2,064.70 km) |
| Klamath Falls to Ogden (Utah) | 510.07 mi (820.88 km) |
| Klamath Falls to Oildale (California) | 491.79 mi (791.47 km) |
| Klamath Falls to Ojus (Florida) | 2,600.20 mi (4,184.61 km) |
| Klamath Falls to Okemos (Michigan) | 1,888.97 mi (3,040.00 km) |
| Klamath Falls to Oklahoma City (Oklahoma) | 1,380.71 mi (2,222.04 km) |
| Klamath Falls to Okmulgee (Oklahoma) | 1,451.96 mi (2,336.70 km) |
| Klamath Falls to Olathe (Kansas) | 1,427.63 mi (2,297.55 km) |
| Klamath Falls to Old Jamestown (Missouri) | 1,660.57 mi (2,672.42 km) |
| Klamath Falls to Oldsmar (Florida) | 2,390.42 mi (3,847.01 km) |
| Klamath Falls to Olean (New York) | 2,195.73 mi (3,533.69 km) |
| Klamath Falls to Olive Branch (Mississippi) | 1,784.03 mi (2,871.12 km) |
| Klamath Falls to Olivehurst (California) | 217.26 mi (349.64 km) |
| Klamath Falls to Olney (Maryland) | 2,325.01 mi (3,741.75 km) |
| Klamath Falls to Olympia (Washington) | 337.70 mi (543.47 km) |
