There were three flights planned on ET aircraft, all using ones that daystop in Europe between their schedules.
The problem is Kiev not allocating slots to widebodies, numerous narrowbodies getting in and out ok
its a ridiculous place to hold a final, with no Loco or road options readily available so everything has to go in by charter, and Liverpool also qualified 24 hours after Madrid giving them a headstart on booking aircraft
demand was always going massively outstrip supply and some people tried to be inventive and also make a nice amount on bringing in African capacity but its just not to be.
feel for the fans but the responsibility for this starts at UEFA deciding this was a good idea, its been much worse since the match was moved to a Saturday, there was always much better charter availability midweek in May.
Finals should only be allocated to cities with at least two H24 airports in the area with sufficient parking, and also somewhere on the Loco network to give fans a reasonable chance. But when has common sense ever come into the way football is run by these bodies.