1967 Source: https://en.wikipedia.org/wiki/History_of_Southwest_Airlines#:~:text=Southwest%20Airlines%20began%20with%20the,King's%2C%20Kelleher%20was%20his%20l

1967 Source: https://en.wikipedia.org/wiki/History_of_Southwest_Airlines#:~:text=Southwest%20Airlines%20began%20with%20the,King's%2C%20Kelleher%20was%20his%20lawyer https://en.wikipedia.org/wiki/History_of_Southwest_Airlines#.... also https://southwest50.com/our-stories/when-herb-met-rollin-the-birth-of-southwest-airlines/#:~:text=Less%20than%20a%20year%20after,name%20to%20Southwest%20Airlines%20Co https://southwest50.com/our-stories/when-herb-met-rollin-the....