In the late 1950s , Southwest Airways changed its name to Pacific Air Lines , which was based at SFO .
Southwest Airways began flying scheduled passenger operations from SFO in 1946 with war surplus C - 47s , the military version of the Douglas DC - 3 .
In the late 1950s , Southwest Airways changed SFO 's name to Pacific Air Lines , which was based SFO SFO .
Southwest Airways began flying scheduled passenger operations from SFO in 1946 with war surplus C - 47s , the military version of the Douglas DC - 3 .