PSA Airlines is a regional airline in the United States and a wholly owned subsidiary of American Airlines Group. It primarily operates an all-jet fleet consisting exclusively of Mitsubishi Heavy Industries (MHI) regional jets, with a team of over 5,000 employees[6][8]. The current PSA Airlines was formed in 1995 when USAir renamed its regional carrier Jetstream International Airlines to PSA Airlines, after acquiring the rights to the Pacific Southwest Airlines (PSA) brand, a historical and iconic airline known for pioneering low-cost air travel in California[5][8]. The original Pacific Southwest Airlines was founded in 1949 by Kenny Friedkin and became famous as "The World's Friendliest Airline" and the "Poor Sailor’s Airline" due to its low fares and quality service, especially catering to Navy personnel in San Diego[1][2]. PSA was a trailblazer in offering discount air travel, competing successfully against major carriers like United and TWA by providing fares often half their price. The airline grew rapidly through the 1950s and 1960s, expanding its fleet from Douglas DC-3s and DC-4s to Lockheed Electra turboprops and Boeing 727 jets, becoming a California intrastate jet pioneer[2][3][4]. It carried millions of passengers annually and was listed on the New York Stock Exchange by 1967[3]. PSA’s legacy includes innovative service models, distinctive branding, and a reputation for efficiency. The original PSA ceased independent operations after being acquired by US Airways, which later merged into American Airlines. The modern PSA Airlines operates regional jet services feeding American Airlines’ hubs, transitioning from turboprops like the Dornier 328 to regional jets such as the CRJ series before adopting the MHI RJ fleet[5][6]. Notable aspects include the preservation of the PSA brand to protect its legacy and the airline’s evolution from a pioneering low-cost carrier to a key regional feede