Why do air flight code-shares exist?

It seems that code-shares are extremely common nowadays, with any flight on a non-budget airline having at least one. However I could never understand why airlines bother with code shares in the first place. I'm pretty sure they can sell connecting tickets on partner airlines without a code-share and having several codes creates some confusion when trying to find your flight at the airport.

So what's the rationale for having a code-share agreement in the first place?

airlines code-share

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Why do airlines code share?

Airlines have codeshare agreements because they want to be able to fly their customers to more destinations without having to buy more planes, hire more flight attendants, and pay more in airport fees. So, airlines partake in partnerships to facilitate this agreement.

How do code share flights work?

A codeshare flight is a way that airlines can virtually fly to more destinations. Essentially, a codeshare is an agreement between airlines to sell seats on each other's flights. For doing so, the airlines share the revenue on that ticket according to the agreement.

What are the advantages of code sharing in airline industry?

Code sharing increases connectivity. It allows travelers to book connections in one place and have their journey completely taken care of by one airline. Travelers are also able to fly on multiple airlines with a single ticket and are protected if any delays arise.

What are the disadvantages of code sharing?

What are the disadvantages of code sharing? No rebooking and upgrades possible. The main drawback of codeshare flights is that such bookings can be extremely difficult to change or rebook, and there can be no upgrades. Because of code sharing, some passengers may go to the wrong terminal and miss their plane.

What does the QANTAS and AIR FRANCE CODESHARE Mean?

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

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