| Los Alamos to Orbetello | 5,743.91 mi (9,243.92 km) |
| Los Alamos to Oria | 6,071.90 mi (9,771.78 km) |
| Los Alamos to Oristano | 5,763.42 mi (9,275.32 km) |
| Los Alamos to Orta Nova | 5,961.55 mi (9,594.19 km) |
| Los Alamos to Orte | 5,785.95 mi (9,311.58 km) |
| Los Alamos to Ortona | 5,864.01 mi (9,437.21 km) |
| Los Alamos to Orvieto | 5,763.46 mi (9,275.39 km) |
| Los Alamos to Orzinuovi | 5,557.68 mi (8,944.23 km) |
| Los Alamos to Osimo | 5,775.73 mi (9,295.14 km) |
| Los Alamos to Ospitaletto | 5,555.42 mi (8,940.59 km) |
| Los Alamos to Ostuni | 6,058.21 mi (9,749.75 km) |
| Los Alamos to Ottaviano | 5,940.96 mi (9,561.05 km) |
| Los Alamos to Ovada | 5,546.39 mi (8,926.05 km) |
| Los Alamos to Ozieri | 5,747.83 mi (9,250.24 km) |
| Los Alamos to Paceco | 6,009.11 mi (9,670.72 km) |
