Delta Air Lines reportedly cancelled 325 flights in the days leading up to Christmas.<br />Christmas was the busiest travel season of the pandemic.<br />A perfect storm of bad weather and a lack of pilots forced Delta to cancel the flights over a three-day period starting December 23.<br />Business Insider reports Thanksgiving similarly saw over 600 flight cancellations at the airline.<br />The cancellations reveal a trend of poor performance for Delta during the holidays.