| Lockhart to Olympia Heights (Florida) | 1,096.96 mi (1,765.38 km) |
| Lockhart to Omaha (Nebraska) | 791.85 mi (1,274.35 km) |
| Lockhart to On Top of the World Designated Place (Florida) | 926.80 mi (1,491.54 km) |
| Lockhart to Onalaska (Wisconsin) | 1,031.16 mi (1,659.49 km) |
| Lockhart to Oneida (New York) | 1,517.97 mi (2,442.94 km) |
| Lockhart to Oneonta (New York) | 1,524.00 mi (2,452.65 km) |
| Lockhart to Ontario (California) | 1,200.62 mi (1,932.22 km) |
| Lockhart to Ontario (Oregon) | 1,439.01 mi (2,315.86 km) |
| Lockhart to Opa-locka (Florida) | 1,097.97 mi (1,767.02 km) |
| Lockhart to Opelika (Alabama) | 751.25 mi (1,209.02 km) |
| Lockhart to Opelousas (Louisiana) | 337.42 mi (543.03 km) |
| Lockhart to Orange (California) | 1,210.62 mi (1,948.30 km) |
| Lockhart to Orange (Texas) | 235.30 mi (378.67 km) |
| Lockhart to Orange City (Florida) | 988.15 mi (1,590.27 km) |
| Lockhart to Orangeburg (South Carolina) | 1,018.44 mi (1,639.02 km) |
