To give JetBlue some credit they have announced a 10% pull down of their flight schedule for the summer. Other airlines need to follow but so far no other management teams are willing to give up the revenue. It appears the current plan at most airlines is to hope for a summer without a single thunderstorm!
I will also add that some of the recent airline woes were induced by the FAA who has understaffed many ATC centers. JAX center in particular has been a problem. They control all north/south traffic out of Florida and have been putting out ground stops that are partly due to understaffing.