OK, so I understand Frontier/Spirit is definitely OFF, but that does not necessarily mean that Jet Blue/Spirit is ON. And regardless it will not be effective until after January 2023. IF you book Spirit and they cancel the flight altogether, you will get your money back. If your only other option is AA, you could buy a FULLY REFUNDABLE ticket on AA and then cancel, if the Spirit flight holds, or cancel and be-book, if the price goes down. Otherwise, if you wait until much later, the price on AA may be even higher than it is now. You would be tying up a substantial bit of money in the process, but if you really want to try the Spirit deal, that is a way to hedge your bets. And another thought, it sounds like you are booking weekend flights, because you are looking at Spirit. Weekday flights on AA may be substantially cheaper than on the weekend. If your hotel is already booked, it might still be cheaper overall to add a day or two at the beginning or end and pay for a hotel, if the weekday flights on AA are cheaper.