I applied online, and received an email a few weeks later to schedule a phone interview. The phone interview was roughly an hour, and very entertaining. The interviewer was very funny and incredibly easy to talk to. The focus was your general STARS questions centering around teamwork, personality and problem solving. Passing that, I received more emails scheduling a time to fly to Atlanta at Delta's HQ. Picked up at the airport by an employee and the beginning of the day started with an assessment test, focusing on inventory, pricing, overbooking, route profitability, etc. Basic math principles and an understanding of how that all works is necessary. Three one on one interviews which were pretty straightforward, all of mine really ending up being a discussion on company culture. There is a lunch break after the 2nd one to one interview, where two current analysts (one a recent hire) take you out to lunch, their treat. Return for the last of the one to one interviews and then spend an hour or so shadowing an analyst and seeing what the job was about. Returned to the airport afterwards.