[QUOTE=born sleepy;35656661]I was returning a rental car at SJC years ago and heard a heavy lifting off to see an AA 772 blasting off to I think TPE. Why not make it a hub-let vs SFO?[/QUOTE]
That was the plan in the late 90s, but AA was forced to sell those feeder flights from LAX, LAS, PDX, and SEA at bargain prices on a standalone basis. By contrast, United didn't face LCC competition at SFO, and had a large international network (compared with AA to NRT and TPE only at SJC).