About 4% of American Airlines flights were cancelled while about 24% of its flights were cancelled.
Flight Delays/Cancellations By Airlines:
United had 4% of its flights delayed and 23% of its flights cancelled.
Delta had 2% of its flight cancelled and 22% of its flight delayed.
Jet Blue had 41% of their flights delayed. While Southwest had 36% of their flights delayed.
Both the airlines and the air traffic control facilities being short-staffed contributed to this woe.