Which airline does not use the ERJ 175?

The correct choice, indicating that American Airlines does not utilize the ERJ 175, is based on specific fleet compositions and operational strategies of the airlines listed. Although American Airlines has a diverse fleet, including regional aircraft, it primarily employs the Embraer ERJ 145 and the CRJ Series for its regional operations, often through its regional affiliates. In contrast, United, Delta, and Alaska Airlines have incorporated the ERJ 175 into their fleets, leveraging this aircraft for its efficiency and capacity on regional routes.

United Airlines operates the ERJ 175 under its regional affiliate, offering enhanced comfort and additional seating capacity. Delta has also integrated the ERJ 175 into its fleet, utilizing them for similar regional route purposes. Alaska Airlines operates the ERJ 175 among other regional jet types, capitalizing on its ability to serve various markets effectively. Thus, American's fleet decisions regarding regional jets account for why they do not include the ERJ 175, while the other airlines do.