1.

Must Article 2(b) and (h), read in conjunction with Articles 3(5), 4(3) and 5(1), of Regulation No 261/2004 of the European Parliament and of the Council of 11 February 2004 establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights, and repealing Regulation (EEC) No 295/91, (2) be interpreted as meaning that, where several legs of a flight are covered by a single reservation, each of the carriers which operated any of the legs covered by that reservation and from which the passenger requests compensation is liable for compensation for flight cancellation, delay or denied boarding, irrespective of other circumstances such as, for instance:

2.

If the answer to question 1a is in the negative – whether, within the meaning of Article 2(f) and (g) of Regulation No 261/2004 of the European Parliament and of the Council of 11 February 2004 establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights, and repealing Regulation (EEC) No 295/91, an online travel agency such as eSky.pl S.A or myTrip.com (Etraveli Group) which offers tickets for the flights operated by a particular carrier should be considered an authorised agent of that carrier, and, consequently, the reservations issued by such an online travel agency should be considered reservations ‘accepted and registered’ by that carrier, and if not – under what conditions is that possible?

3.

If the answer to question 1b is in the negative – what conditions must the legal relationship between the carriers meet in order for it to be considered, within the meaning of Article 2(b) and (h) of Regulation No 261/2004 of the European Parliament and of the Council of 11 February 2004 establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights, and repealing Regulation (EEC) No 295/91, that in the event that several legs of a flight are covered by a single reservation, each of the carriers which operated any of the legs covered by that reservation and from which the passenger requests compensation is liable for compensation for flight cancellation, delay or denied boarding – in particular, is the existence of an interline agreement, that is to say, an agreement under which carriers are authorised to issue tickets that cover legs operated by other carriers, necessary and sufficient in that regard?

4.

If the answer to question 1b is in the negative and the answer to question 3 is that an interline or other agreement is necessary – in the light of Article 2(b) and (f) of Regulation No 261/2004 of the European Parliament and of the Council of 11 February 2004 establishing common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights, and repealing Regulation (EEC) No 295/91, can it can be presumed that since a single reservation was issued covering legs corresponding to flights operated by different carriers (by any of those carriers, a tour operator, an online travel agency, or another entity), those carriers are linked by a legal relationship that is required to assume their joint and several liability for the disruption of the connecting flight, irrespective of the leg (and whether it was operated by them) on which the disruption occurred?