Under the Fair Labor Standards Act (FLSA), time spent traveling during normal work hours is considered work time and employees must be paid for this travel time. Generally, time spent commuting is not work time. The FLSA is administered and enforced by the Wage and Hour Division of the Employment Standards Administration.

Travel to your first customer is considered normal working hours and your should be compensated, but travel home is considered your commute and is not payable. Only exceptions are if you sign a contract waving right to get paid for travel. (signing for your employee handbook, etc)

Its the law. Make sure your employer pays for your travel time.