Club will 100% put on flights. Cost of them is anyones guess. Very unlikely they'll put on free flights again, just look at the seasonticket price increases to see the club give zero fucks about the fans. I'd like to think they'd at least swallow some of the inevtiable price hikes themselves but who knows anymore.
All I'll say is, you aren't going to get much of a saving booking now and praying we get there compared to waiting until next week. Prices will temporarily shoot up next Wednesday if we beat madrid then when city and whatever partners announce travel plans a few days later, the prices will settle to what they are now at worst.
You either go really Early and book around the last 16 period for a genuine potential bargain or you just wait.