<P> Pacific Southwest Airlines ( PSA ) was a United States airline headquartered in San Diego , California , that operated from 1949 to 1988 . It was the first large discount airline in the United States . PSA called itself `` The World 's Friendliest Airline '' and painted a smile on the nose of its airplanes , the PSA Grinningbirds . Opinion L.A. of the Los Angeles Times called PSA `` practically the unofficial flag carrier airline of California for almost 40 years . '' </P>
<P> Pacific Southwest Airlines ( PSA ) was a United States airline headquartered in San Diego , California , that operated from 1949 to 1988 . It was the first large discount airline in the United States . PSA called itself `` The World 's Friendliest Airline '' and painted a smile on the nose of its airplanes , the PSA Grinningbirds . Opinion L.A. of the Los Angeles Times called PSA `` practically the unofficial flag carrier airline of California for almost 40 years . '' </P>
when did psa airlines go out of business
when did psa airlines go out of business
1988
1988