$42.2 billion (2017)
How they do it: American Airlines core revenue comes from selling plane tickets but it uses cross-selling tactics to increase their revenue per seat. Examples for these are e.g. in-flight shopping, offer of ancilliary travel service such as rental cars or hotels.
How they do it: Airlines such as American Airlines have a big customer loyalty program, rewarding passengers for flying and spending with the airline. Through their loyal behaviour, customers can earn status which allows benefits such as lounge access, upgrades and priority treatment as well as spend loyalty points to purchase physical goods.
How they do it: American Airlines sells a large portion of their tickets directly through their own website channel instead of 3rd party travel agencies. This allows them to cash in the retail margin on their own.
How they do it: First class travelers and guests with the highest loyalty status enjoy exclusive treatment and amenities such as limousine airport transfer, exclusive lounges as well as in-flight luxury dining.