Originally Posted by
FlyerWx
Slightly less than 80% is actually better than May when 73% of DL flights were on-time (64% and 61% for UA and AA respectively). During June, DFW saw multiple strong convective storm systems move through. DL's NYC and ATL hubs also saw occasional thunderstorms. To me, 80% isn't terrible in the summertime with thunderstorms.
More on topic, I think OP saw that while Delta does move planes around, it seems they do try to minimize the overall impact to passengers.
Considering the OP's flight left MSP 11 minutes late and arrived 5 minutes early into CLE, I don't see any issue. Looks like ops knew what they were doing on that decision.
They still need to get the on time performance above 80% though. That's not acceptable IMO.