| Lealman to Olympia Heights (Florida) | 204.70 mi (329.44 km) |
| Lealman to Omaha (Nebraska) | 1,197.61 mi (1,927.37 km) |
| Lealman to On Top of the World Designated Place (Florida) | 92.09 mi (148.21 km) |
| Lealman to Onalaska (Wisconsin) | 1,206.82 mi (1,942.19 km) |
| Lealman to Oneida (New York) | 1,124.77 mi (1,810.14 km) |
| Lealman to Oneonta (New York) | 1,097.82 mi (1,766.78 km) |
| Lealman to Ontario (California) | 2,103.29 mi (3,384.92 km) |
| Lealman to Ontario (Oregon) | 2,198.39 mi (3,537.96 km) |
| Lealman to Opa-locka (Florida) | 200.05 mi (321.96 km) |
| Lealman to Opelika (Alabama) | 371.07 mi (597.18 km) |
| Lealman to Opelousas (Louisiana) | 596.69 mi (960.28 km) |
| Lealman to Orange (California) | 2,115.09 mi (3,403.92 km) |
| Lealman to Orange (Texas) | 687.84 mi (1,106.97 km) |
| Lealman to Orange City (Florida) | 114.65 mi (184.50 km) |
| Lealman to Orangeburg (South Carolina) | 406.56 mi (654.30 km) |
