A codeshare agreement, also known as codeshare, is a common commercial agreement in the aviation industry, in which two or more airlines publish and market the same flight under their own airline manager and flight number (the « flight code ») as part of their published flight plan. Typically, a flight is designated by an airline (technically referred to as the « administration company »), while seats are sold by all airlines that have cooperated with their own name and flight number. In 1967, Richard A. Henson joined the country`s first codeshare relationship with US Airways` predecessor, Allegheny Airlines.  The term « codeshare » was coined by Qantas and American Airlines in 1989 and in 1990, the two companies made available their first codeshare flights between a number of Australian and American cities. Since then, the sharing of parts of codes has spread in the aviation sector, particularly as part of the formation of major airline alliances. These alliances have extensive code-sharing and network loyalty programs. Over the past 30 years, consumers have often and rarely asked airlines to streamline and streamline the entire travel process. One of the by-products of consumer mood was code sharing.
American Airlines operates AA125, but Cathay Pacific also participates in this code-sharing with the flight number « CX7681. » Cathay Pacific`s U.S. routes used all flight numbers in the 1980s (the number 8 is considered promising in Chinese culture), which is very different from the 4-digit code-sharing format. Interline agreements are another term whose meaning is slightly different from that of the code-sharing agreement. In principle, as explained above, code sharing is a kind of commercial contract between marketing and operating companies. On the other hand, Interline Agreement is a kind of contract between airlines. It makes it easier for passengers who need flights with more than one airline to reach their final destination. When a flight is sold between several designers and flight numbers, as described above, the flight published by the « Administrating Carrier » is generally called « Prime Flight » (unlike a codeshare marketing flight). It is quite difficult to unknowingly book a codeshare flight with points and miles. That said, it`s important to be able to tell if you`re on a codeshare flight.
The main reason you want to know if you are on a codeshare flight is to confirm what type of business/first class product you are flying. Interline agreements are one of the life-saving graces that have passengers that reduce your travel headaches. If something happens, if it is a terrible time at other unexpected events, the Interline agreements will allow airlines to redirect customers to their final destination. Conclusion: Ideally, before booking, you should know if your flight is a codeshare flight. If not, you should at least research your flight to find out which aircraft it is and what the exact nature of the product it contains is. If you don`t, you might be very disappointed. As a general rule, low-cost airlines do not participate in Interline agreements, so be aware of this. If you know that your flight is a codeshare flight, you should find out as soon as possible who the exporting airline is.