McCarran International Airport in Las Vegas set a record in 2019 with 51.5 million travelers passing through its gates. Generally, the busiest travel days at McCarran are Friday, Sunday and Monday. The coronavirus pandemic has ground air travel to a trickle. Here are photos of the airport taken Friday, when it is usually very busy.
https://vegaschanges.com/2018/01/01/essentials-in-las-vegas/