| Los Alamos to Orangevale (California) | 842.31 mi (1,355.56 km) |
| Los Alamos to Orchards (Washington) | 1,082.80 mi (1,742.59 km) |
| Los Alamos to Orcutt (California) | 798.76 mi (1,285.48 km) |
| Los Alamos to Oregon (Ohio) | 1,289.30 mi (2,074.92 km) |
| Los Alamos to Oregon (Wisconsin) | 1,021.90 mi (1,644.59 km) |
| Los Alamos to Oregon City (Oregon) | 1,072.47 mi (1,725.98 km) |
| Los Alamos to Orem (Utah) | 423.25 mi (681.16 km) |
| Los Alamos to Orinda (California) | 887.83 mi (1,428.82 km) |
| Los Alamos to Orland Park (Illinois) | 1,065.74 mi (1,715.14 km) |
| Los Alamos to Orlando (Florida) | 1,541.04 mi (2,480.06 km) |
| Los Alamos to Ormond Beach (Florida) | 1,530.15 mi (2,462.53 km) |
| Los Alamos to Oro Valley (Arizona) | 359.72 mi (578.92 km) |
| Los Alamos to Oroville (California) | 870.35 mi (1,400.70 km) |
| Los Alamos to Oshkosh (Wisconsin) | 1,090.50 mi (1,754.99 km) |
| Los Alamos to Oskaloosa (Iowa) | 824.66 mi (1,327.16 km) |
