It depends on the reason for the delay or cancellation.

• If the delay or cancellation is due to an airline issue (such as mechanical problems or staffing shortages), the airline is obliged to place the passenger on the next available flight that day or, if that’s not possible, provide accommodation for the night.
• If the delay or cancellation is due to circumstances outside the airline’s control (such as bad weather or air traffic control restrictions), the airline is not required to provide accommodation or compensation.
• Any travel disruptions, delays, or out-of-pocket costs (e.g., accommodation, hire cars, missed connections) are your responsibility unless you have your own travel insurance policy in place.