| Bovisio Masciago to Olympia Heights (Florida) | 4,946.38 mi (7,960.42 km) |
| Bovisio Masciago to Omaha (Nebraska) | 4,872.54 mi (7,841.59 km) |
| Bovisio Masciago to On Top of the World Designated Place (Florida) | 4,877.34 mi (7,849.33 km) |
| Bovisio Masciago to Onalaska (Wisconsin) | 4,568.45 mi (7,352.21 km) |
| Bovisio Masciago to Oneida (New York) | 3,986.90 mi (6,416.30 km) |
| Bovisio Masciago to Oneonta (New York) | 3,986.38 mi (6,415.45 km) |
| Bovisio Masciago to Ontario (California) | 6,007.68 mi (9,668.42 km) |
| Bovisio Masciago to Ontario (Oregon) | 5,420.54 mi (8,723.51 km) |
| Bovisio Masciago to Opa-locka (Florida) | 4,934.34 mi (7,941.05 km) |
| Bovisio Masciago to Opelika (Alabama) | 4,848.35 mi (7,802.67 km) |
| Bovisio Masciago to Opelousas (Louisiana) | 5,235.91 mi (8,426.38 km) |
| Bovisio Masciago to Orange (California) | 6,028.07 mi (9,701.25 km) |
| Bovisio Masciago to Orange (Texas) | 5,326.13 mi (8,571.59 km) |
| Bovisio Masciago to Orange City (Florida) | 4,840.45 mi (7,789.95 km) |
| Bovisio Masciago to Orangeburg (South Carolina) | 4,614.29 mi (7,425.98 km) |
