Low-cost US airlines offer affordable air travel options to passengers. These airlines focus on providing budget-friendly fares by offering fewer frills and amenities compared to full-service carriers. Some popular low-cost US airlines include Southwest Airlines, JetBlue Airways, Spirit Airlines, Allegiant Air, and Frontier Airlines.

Low-cost US airlines offer affordable air travel options to passengers. These airlines focus on providing budget-friendly fares by offering fewer frills and amenities compared to full-service carriers. Some popular low-cost US airlines include Southwest Airlines, JetBlue Airways, Spirit Airlines, Allegiant Air, and Frontier Airlines.