Airline alliances seek to give travellers a coherent journey across independent carriers. Their members, however, retain separate networks, shareholders, IT systems, employees, commercial interests and operational obligations. That creates a governance question: who is responsible for recognition, connections, lounges, rebooking and service recovery when an itinerary crosses several companies? The oneworld conversations with Nathaniel Pieper, Roger Blackburn and Gilbert Ott examine the alliance-wide proposition and the limits of shared responsibility. Mauro Oretti explains SkyTeam's membership and operational approach, while Sidharth Grover discusses how Star Alliance coordinates its identity and benefits across carriers. Lufthansa's regional strategy adds another distinction: an alliance is not the same institution as a commercially integrated joint venture. This hub is about the legal, commercial and practical mechanisms that join airlines, rather than simply a list of frequent-flyer perks.