Interesting https://www.wsj.com/articles/the-u-s-travel-surge-isnt-comingits-here-11621429908?
21%
That’s the percentage of planes in storage at American, United, Delta and Southwest combined as of May 14, according to Cirium, an aviation data company. One year ago, 56% of the planes at the four largest U.S. carriers were in storage. That amounted to nearly 2,000 airplanes in storage as of May 14 last year—a much higher number than normal for that time of year.
Southwest has the highest percentage of its fleet in service, with only 15% of its all-737 fleet in storage. American, which has the largest fleet, with more than 1,000 jets, still has 24% in storage. But American has said it would activate most of its fleet by the end of June.