The Fair Labor Standards Act (FLSA) does not address life insurance, travel accident insurance, or long-term care insurance. These benefits are generally a matter of agreement between an employer and an employee (or the employee's representative).
DOL Web Pages on This Topic
Employee Benefits in Medium and Large Private Establishments (PDF)
This Bureau of Labor Statistics (BLS) report shows participation in selected employee benefit programs, full-time employees, medium and large private establishments.