Originally Posted by Slaphappy

This is form wikipedia.

Largest Airlines at LAX (January to December 2017)[110]
Rank Airline Passengers Share
1 American Airlines 15,924,844 18.83%
2 Delta Air Lines 14,084,978 16.66%
3 United Airlines 11,987,295 14.18%
4 Southwest Airlines 9,899,630 11.71%
5 Alaska Airlines 3,651,118 4.32%


In all honesty SFO is more important and more can be done with it.