Low Season fares. Christmas Holiday fares. Spring Shoulder Season fares. Summer Peak Season fares. Autumn Shoulder Season fares.
Every major airport has it's own three letter airport code.
Chicago - Ohare is ORD, and MSY is New Orleans. We generally list recognized three letter city abbreviations for easy identification. It is frequently possible to find a competitive airfare right from your home town, so you don't need to drive four hours to get to another, larger airport.