I might be missing something, but why have there been so many mainline DL cancellations lately?
7% of flights canceled Friday, 12% yesterday, 9% today. UA had issues with ORD and EWR (and DEN on Friday), and AA with major DFW problems, but their cancellations are nowhere close to DL’s numbers.
Three days in a row of significant cancellations seems high, especially when AA and UA have hubs in the same regions.