In April 2020 — the early days of the pandemic — the number of people passing through airport security was 96% lower than the same period a year before. Since then, the number of people flying has rebounded, though not to reach pre-pandemic levels.
The map below shows how the number of people clearing Transportation Security Administration (TSA) checkpoints has changed at the country's 60 busiest airports during every week of the pandemic.
and its corresponding week before the pandemic, the week of 
. See the national numbers for airline passengers and other metrics on the COVID-19 Impact and Recovery Hub.