The term "airline partners" refers to airlines that have formed a strategic alliance or agreement with one another. This can include sharing resources, such as aircraft and flight crews, coordinating schedules, and offering reciprocal benefits to frequent flyers of both airlines. By working together in this way, the partner airlines are able to offer more flights, destinations, and services than they would be able to on their own, while also reducing costs through shared resources. This can result in a better overall experience for passengers, who may have access to a wider range of routes and benefits such as priority boarding or free upgrades.