Employees are entitled to pay for time spent traveling during the hours when they regularly work (the period of the day they regularly work), even if they ordinarily work Monday through Friday but travel on the weekend. For example, if Tom usually works 9 to 5, and leaves the office at 3 p.m. to catch a flight for an overnight business trip, he should be paid for the two remaining hours in his day, but not for the rest of the time he spends traveling that evening. But if Tom returns home on a 10 a.m. Saturday flight that takes four hours, he is entitled to be paid for all of that time. Even though he traveled on the weekend, the flight took place during his ordinary hours of weekday work.