Hello, I am considering AirPass and was wondering if y’all found that you were able to do the "instant upgrade" fare to book Economy but be instantly moved to Business? If so, do you find that the full-fair Economy is comparable (or cheaper/more expensive) to the going rate for Business? Is the primary reason you acquired AirPass was that you frequently book last minute tickets?

for example, AA1871 LAX-CLT on 1/19. Can you let me know what this prices out to in Y using AirPass and whether the instant upgrade to J is available?