PSA Logo CoasterPacific Southwest Airlines (PSA) soared to the skies in 1949 quickly becoming Californias favorite way to fly. With its famously low fares, bold personality and signature smile painted on every plane, PSA air travel was fun and accessible. Nicknamed The Worlds FriendliestAirline, PSA was a trailblazer in low cost air travel long before Southwest, leading the way withjet service, widebody aircraft and even a short lived international route to Mexico.