The ON TIME Act aims to enhance passenger communication during flight disruptions by requiring air carriers to provide timely notifications for specific types of delays. This legislation mandates that when a scheduled passenger flight experiences a delay due to maintenance or crew rest issues , and no replacement aircraft or crew is available, the airline must inform affected passengers. A key provision is the requirement to immediately disclose an estimated duration of the delay . If an estimate is not instantly available, carriers must notify passengers of this fact and then provide the estimate as soon as it becomes known. These critical updates must be disseminated through multiple channels, including airport public address systems , gate display boards , and direct electronic methods such as text, email, and the airline's mobile application, ensuring passengers receive comprehensive and accessible information.