How many minutes prior to departure is the flight attendant required to be on board the aircraft?

The requirement for flight attendants to be on board the aircraft prior to departure is designed to ensure that they are present to perform necessary pre-flight duties. This includes conducting safety checks, preparing the cabin for passengers, completing a safety briefing, and familiarizing themselves with any specific procedures or instructions for the flight.

Being on board 35 minutes before departure ensures that the flight attendants have adequate time to manage these responsibilities effectively, as well as to respond to any last-minute issues that may arise. This timeframe allows for a comprehensive check of the cabin, securing the service equipment, and allowing any communication with the flight crew to ensure a safe and organized boarding process.

The other options do not meet the time requirement specified for flight attendants, as they would either shorten the preparatory period and potentially compromise safety protocols or lead to a rushed environment for both the crew and the passengers.