18It must be borne in mind that the EU legislature has laid down the obligations of air carriers in the event of cancellation or long delay of flights (that is, a delay equal to or in excess of three hours) in Article 5(1) of Regulation No 261/2004 (see judgment of 4 May 2017, Pešková and Peška, C‑315/15, EU:C:2017:342, paragraph 19 and the case-law cited).
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