Originally Posted by
Sk1schoolsam
LAX is a hub for United and Delta Airlines. I have been in both this year. They are more focused on West bound Pacific traffic and transcontinental flights. T4 SFO is a Delta hub and had a number of European flights and code shares that I saw.
LAX is a focus city for both airlines but a hub for neither, there's a huge difference mate. LAX is the BOS of the West Coast, bit US3 presence, no actual hub and spoke operation although they do feed into California and beyond.
Delta don't actually fly transatlantic from SFO so far as I am aware, codeshares will be on KLM. United however DO hub at SFO, it's one of their biggest.