Total meltdown today in NYC - but mainly for Delta. This is not ATC or thunderstorms. At one point, DL asked the FAA to institute a ground stop for all inbound DL flights. Between DL and 9E, they have had a massive failure today:
https://flightaware.com/live/cancelled/today
And of course, it is now spilling over into tomorrow. My 6AM flight already cxld. No protection ALL DAY out of any NY airport to MSP on DL except for (maybe) a connection via BTV which sounds about as likely to not operate as anything else.
Delta has gone to hell.