In code-sharing and operational carrier situations, flight segments have the same code as the validating carrier, but are operated by other airlines. The ITA table is verified between the validating airline and the airline defined in DEI50. Note: DEI50 is an SSIM message that refers to comments posted in a Flight Information Entry (DO). 50 Duplicate Leg Cross Reference – Operation Leg Identification is the marketing carrier`s commentary indicating the operating flight number. Airlines participating in airline alliances such as Star Alliance, SkyTeam or oneworld almost always have interline agreements. But direct competitors can also benefit from Interline agreements. An Interline agreement, also known as interlining, Interline Billeting or Interline-Reservation, is an agreement between two or more airlines to treat passengers when their itinerary involves travel with several airlines. This means that they undertake to ship their luggage to their final destination and check them in for their destination. A codeshare flight is different from an Interline flight, because a codeshare flight is the entire flight, while an interline is a flight within a larger route. Code actions are essentially joint marketing agreements between airlines that allow an airline to place its own flight code on flights (piloted) by another airline and sell tickets as if those flights were theirs. There are many (and some consider too much) code actions that work today. When code actions are involved, the airline that places its code on the flight is designated as a marketing company, and the airline that actually performs the flight is designated as the exporting airline.
There are actually two types of code sharing. The first (and most people don`t notice much) is regional contract flights. Here, the airline that makes the flight does so under a contract for a major airline and does not sell its own tickets. You see it a lot in the United States, where major airlines assign flights and market them with the American Eagle, Delta Connection and United Express brands. Sometimes the airlines (operating) are full third parties (z.B Skywest, ExpressJet) and sometimes low-cost subsidiaries of the parent company (z.B. Envoy Air is a subsidiary of American, Air Japan is a subsidiary of ANA and Rouge a subsidiary of Air Canada). But in any case, these flights will be treated as if they were the marketing company`s own flights, and you will always check in with the marketing company, its baggage will apply and the transfer rules will apply. This is the second type of code sharing that receives the most attention. Here, major airlines file their codes on flights of other major airlines, such as buying an American ticket with an AA flight code and discovering that you are actually travelling on a British Airways flight. Codeshare partners do not need to be in the same alliance, and there are many examples of airlines from competing alliances that share the code.B. Air New Zealand (Star) and Cathay Pacific (Oneworld) or United (Star) and Aer Lingus (unconnected).
For all intents and purposes, code-sharing partners must have an interline agreement, as this is the Interline agreement, which allows flights to be carried out on a ticket and baggage to be carried out by the screening. The advantages of codeshares for frequent flyers are that they get miles and elite qualification points on code actions operated by another carrier (although many already have kilometer programs). It is also a way – even if it is not the only one – to book flights from different airlines to the same ticket, and sometimes the only way to do so via an airline`s website. For airlines, a great advantage is that more of their flights appear at the forefront of search engines, in particular, which would otherwise be multi-carrier tickets. Can Sombody help me? The witch companies have Qatari? I`m stealing SAS