That is a difficult question, but to answer it, Hopper.com conducted a comprehensive study of the following airlines: Spirit, Frontier, AirTran, JetBlue, American, Virgin, US Airways, United, Delta, and Alaska Airlines.
Southwest was not included in the study because, according to Hopper.com, the airline does not share data with Global Distribution Systems.
Hopper.com examined ticket prices, airline fees, customer satisfaction surveys, and seat size and pitch to identify the best and worst airlines for different types of travelers.....