Duke787

I took it to mean air travel recovery. It's part of the bigger quote above from the earnings announcement release:

“Given the combined effects of the pandemic and associated financial impact on the global economy, we continue to believe that it will be more than two years before we see a sustainable recovery. In this difficult environment, the strengths that are core to Delta’s business –our people,our brand, our network and our operational reliability –guide every decision we make, differentiating Delta with our customers and positioning us to succeed when demand returns.”