The US Department of Transportation (DOT) has implemented new regulations outlining the circumstances under which passengers are entitled to automatic refunds for flights canceled or significantly altered. These regulations aim to streamline the refund process and ensure consistency among airlines. Passengers will now receive refunds if their flights undergo a significant change, such as a schedule change of more than three hours, a change in departure or arrival airport, or a significant downgrade in seating. Other situations eligible for refunds include lost bags not delivered within a specified time frame and undelivered paid services like in-flight Wi-Fi or entertainment. The DOT has also required airlines to clearly disclose additional fees for checked luggage, carry-on bags, and reservation changes to prevent unexpected charges.