29 CFR 785.39: Travel away from home community.

Travel that keeps an employee away from home overnight is travel away from home. Travel away from home is clearly worktime when it cuts across the employee's workday. The employee is simply substituting travel for other duties. The time is not only hours worked on regular working days during normal working hours but also during the corresponding hours on nonworking days. Thus, if an employee regularly works from 9 a.m. to 5 p.m. from Monday through Friday the travel time during these hours is worktime on Saturday and Sunday as well as on the other days. Regular meal period time is not counted. As an enforcement policy the Divisions will not consider as worktime that time spent in travel away from home outside of regular working hours as a passenger on an airplane, train, boat, bus, or automobile.