I'm booked on DL for EYW-ATL-HOU on Thursday, returning next Monday. Booked WN fully refundable Business Select MIA-HOU nonstops as a backup option just now, as I'm losing confidence that Delta will recover from this mess in anything less than a week. If DL recovers quickly, I can always cancel the WN flights for a refund. If not, I'll take an e-credit for the DL flights. The only real downside is having to drive up to MIA Thursday and back down to Key West Monday.

DL is already at 549 cancellations today (14% of schedule), and its barely past 5 AM EDT.