Additionally, what happens if you leave Jetblue for a CPP regional and you get unlucky with the Hogan or have a bad day in the interview? You’ve now given up a great career at a major airline and the earning potential and DC retirement that comes along with it.
I’d stay at JB and keep working hard towards your goal and to echo what others have said try to get involved in whatever capacity you can. If at the end of the day it just wasn’t meant to be at UA, you’re still going to have a great career at JB or any other major that might call you.