This Overview from November 2020 shows hundreds of airplanes parked at the Roswell International Air Center in Roswell, New Mexico. Scenes of grounded planes like this were commonplace throughout last year as COVID-19 upended the airline industry, but air travel is now on the rebound. Although major U.S. airports are still serving far fewer travelers than they did before the pandemic, average daily passenger volumes have risen consistently in 2021, from roughly 600,000 in early January to as high as 1.8 million this week.