| Moncalieri to Olympia Heights (Florida) | 4,891.74 mi (7,872.49 km) |
| Moncalieri to Omaha (Nebraska) | 4,844.51 mi (7,796.49 km) |
| Moncalieri to On Top of the World Designated Place (Florida) | 4,827.07 mi (7,768.42 km) |
| Moncalieri to Onalaska (Wisconsin) | 4,539.77 mi (7,306.05 km) |
| Moncalieri to Oneida (New York) | 3,947.08 mi (6,352.21 km) |
| Moncalieri to Oneonta (New York) | 3,945.41 mi (6,349.52 km) |
| Moncalieri to Ontario (California) | 5,991.45 mi (9,642.30 km) |
| Moncalieri to Ontario (Oregon) | 5,412.05 mi (8,709.85 km) |
| Moncalieri to Opa-locka (Florida) | 4,879.79 mi (7,853.27 km) |
| Moncalieri to Opelika (Alabama) | 4,803.65 mi (7,730.73 km) |
| Moncalieri to Opelousas (Louisiana) | 5,194.23 mi (8,359.31 km) |
| Moncalieri to Orange (California) | 6,011.86 mi (9,675.16 km) |
| Moncalieri to Orange (Texas) | 5,285.41 mi (8,506.05 km) |
| Moncalieri to Orange City (Florida) | 4,789.31 mi (7,707.65 km) |
| Moncalieri to Orangeburg (South Carolina) | 4,567.20 mi (7,350.20 km) |
