Charter airlines refer to airlines that offer charter flights to passengers. These airlines do not operate regular schedules but serve specific travel needs like corporate travel, sports teams travel, and group travel. Synonyms for the word charter airline include non-scheduled airlines, air charters, aircraft rental services, private air services, and executive travel services. While these synonyms may have slightly different meanings, they generally refer to the same type of service. Charter airlines offer a more flexible and personalized option for travel compared to commercial airlines, which follow a strict schedule and are not customizable. Overall, charter airlines provide a unique travel experience for their customers.