UAL is a great company to work for, very pilot friendly flight ops management, treat employees very well. We are already in early openers for our next contract. I believe our work rules and profit sharing are generally a bit better then American, pay is similar at all 3 majors. We have very large retirements from 2018 on so we will be hiring in large numbers in the future. Lots of great guys to fly with here. You could get SFO as a new hire, but doubt you would be there long. EWR goes jr and has a great variety of flying on the 737. ORD is also a jr base and IAD is smaller but relatively jr for a new hire. Denver and IAH are pretty stagnant at the moment. Best of luck!!