An airlines alliance is a partnership between multiple airlines that work together to provide better services to their customers. These alliances allow member airlines to share resources, such as airport lounges and flight schedules, making it easier for passengers to connect between different flights. There are three major global alliances: Star Alliance, Oneworld, and SkyTeam. By collaborating, these airlines can offer more destinations, streamline check-in processes, and provide frequent flyer benefits across the network, enhancing the travel experience for their customers.