The key element about ULCCs is very simple: you just get no-frills air tickets and à la carte pricing for everything else, which allows you to fly for the lowest possible price. Almost no extras are included in the basic price so that you can get a plane ticket for less.

An Ultra-Low-Cost Carrier (ULCC), such as Spirit, Frontier, or Ryanair, operates on a business model centered on unbundling and cost minimization. The core elements include a single-type aircraft fleet (often all Boeing 737s or Airbus A320s) to reduce maintenance and training costs, and high-density seating configurations to maximize the number of passengers per flight. The "lead-in" fare is kept extremely low—sometimes just a few dollars—covering only the seat and a small personal item. Everything else is treated as an "ancillary" add-on: carry-on bags, checked bags, seat assignments, bottled water, and even printing a boarding pass at the airport incur additional fees. ULCCs also focus on "point-to-point" routes rather than the "hub-and-spoke" model used by legacy carriers, often flying into secondary airports with lower landing fees. This model allows ULCCs to maintain a Cost per Available Seat Mile (CASM) that is significantly lower than traditional airlines, making air travel accessible to a much wider demographic while relying heavily on non-ticket revenue to maintain profitability.