Judgment of the Court (Third Chamber) of 10 July 2019.#HQ and Others v Aegean Airlines SA.#Request for a preliminary ruling from the Rechtbank Noord-Nederland.#Reference for a preliminary ruling — Air transport — Regulation (EC) No 261/2004 — Common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights — Flight cancellation — Assistance — Right to reimbursement of the cost of the air ticket by the air carrier — Article 8(2) — Package tour — Directive 90/314/EEC — Insolvency of the tour organiser.#Case C-163/18.