The United States Department of Transportation defines a major carrier or major airline carrier as a U.S.-based airline that posts more than $1 billion in revenue during a fiscal year, grouped accordingly as "Group III".[1] According to FY2024 revenues, 19 major carriers meet the requirement for Group III status.[2] (*) - considered one of the "Big 4" major U.S. national airlines[3] This article about an aviation-related organization is a stub.You can help Wikipedia by expanding it.