Originally Posted by
764toHI
I've tried this before. You can check luggage and collect boarding passes at B arrivals for UA flights, but it seems like the TSA checkpoint to the B4x gates is usually pre-check lite and everyone goes into one line so it's not really a timesaver. Add in the wait for the bus and you're probably worse off than going to C, which I find to be relatively pleasant these days. Suppose YMMV.
Good to know that it's doable. I like the arts lounge, (since i never have UA lounge access.) So in the future may check in at B then hang at Arts lounge and leave enough time to clear security at B.