| Kissing to Olympia Heights (Florida) | 4,969.62 mi (7,997.84 km) |
| Kissing to Omaha (Nebraska) | 4,820.11 mi (7,757.22 km) |
| Kissing to On Top of the World Designated Place (Florida) | 4,886.93 mi (7,864.75 km) |
| Kissing to Onalaska (Wisconsin) | 4,518.31 mi (7,271.52 km) |
| Kissing to Oneida (New York) | 3,967.84 mi (6,385.61 km) |
| Kissing to Oneonta (New York) | 3,970.51 mi (6,389.92 km) |
| Kissing to Ontario (California) | 5,924.76 mi (9,534.98 km) |
| Kissing to Ontario (Oregon) | 5,321.26 mi (8,563.73 km) |
| Kissing to Opa-locka (Florida) | 4,957.31 mi (7,978.02 km) |
| Kissing to Opelika (Alabama) | 4,841.26 mi (7,791.25 km) |
| Kissing to Opelousas (Louisiana) | 5,219.35 mi (8,399.73 km) |
| Kissing to Orange (California) | 5,945.08 mi (9,567.69 km) |
| Kissing to Orange (Texas) | 5,306.72 mi (8,540.34 km) |
| Kissing to Orange City (Florida) | 4,852.78 mi (7,809.80 km) |
| Kissing to Orangeburg (South Carolina) | 4,614.73 mi (7,426.69 km) |
