Way back when, Soaring/Jumping were a single summer program - you did both in 3 weeks. Then around '83 they became separate summer programs. In the summer, you could normally get the flights thru solo done in less than 12 days and summer parachuting wasn't weathered out either, so even though I 'gave up leave to take both, I effectively didn't lose any leave and still completed both programs.
No idea how the schedules work nowadays, but when I took parachuting in the summer, the ground training was 5? days, and the rest of the time was to get your 5 jumps. Pretty sure I did my first 4 jumps in one day and my 5th the next.
It clearly becomes more of an issue during the academic year based on your academic schedule and greater chances of inclement weather, but I went to USAFA to do things I couldn't do anywhere else, so a couple of days of missed leave was nothing.