A Deeper Look At United & American’s Competition at Chicago-O’Hare

American Airlines and United Airlines are two of the world’s largest and most influential carriers. The latter is the world’s largest airline by the number of destinations served, while the former is the world’s largest by employees and available seat capacity. Both carriers have made a profound impact on the industry as a whole, as they have each built massive hubs and helped build a global brand that identifies them as major airlines serving the United States.