I was originally introduced to airline alliances as a way to maximize airline miles back in 2015. Originally constructed as an agreement between two airlines, has expanded into so much more. Three major alliances now exist, that shortens the connection between continents and bring easy access to the world.
Although it creates a loss of competition amongst airlines, the parks are far greater than the risk. There's a benefit to the airlines, such as reduced cost and an integrated booking system. Passengers are rewarded with lower fares and shorter waiting times. Airline miles are accumulated at a better efficiency and round the world (RTW) tickets are easier to book.
There are three major alliances: The Star Alliance, The Oneworld, and the Skyteam.
The Star Alliance started in 1997 by five airlines: Air Canada, Lufthansa, Scandinavian Airlines, Thai Airways International and United Airlines. With the aim of efficiency and connecting every major city in the world, this alliance was the first in operation. The alliance now consists of 28 member airlines, 27 airlines, and 1 connection partner.
All Star Alliance Members:
Air New Zealand
All Nippon Airways
JuneYao Airlines (Connection partner)
LOT Polish Airlines
South African Airlines
Swiss International Airlines
Oneworld was created by American Airlines, British Airlines, and Quantas. This was the second alliance to be formed in 1999. They were quickly joined by Finnair and Iberia. The Oneworld targets more of a business clientele with strategic locations around the world.