Originally Posted by
caburrito
Never delete. Just let them pile up. Don't really care as long as the newest BP is at the top. Except for Korean Air. They like to group all their passes together, regardless of date. Which makes it very confusing as to where your BP went.
Of course, if you took 7 seconds to delete irrelevant, expired boarding passes after the flight is completed, then you'd never get "very confused" even when flying Korean Air
Regards