Judgment of the Court (First Chamber) of 21 December 2021.#Airhelp Limited v Laudamotion GmbH.#Request for a preliminary ruling from the Landesgericht Korneuburg.#Reference for a preliminary ruling – Air transport – Regulation (EC) No 261/2004 – Common rules on compensation and assistance to passengers in the event of cancellation or long delay of flights – Article 2(l) – Article 5(1)(c) – Flight booked through an online platform – Flight departure time brought forward by the operating air carrier – Classification – Receipt of notification of the flight being brought forward sent to an electronic address not belonging to the passengers concerned – Directive 2000/31/EC – Electronic commerce – Article 11 – Presumption of receipt – Scope of the operating air carrier’s obligation to provide information.#Case C-263/20.