American Airlines check-in counters sit closed last month behind plastic barriers at Los Angeles International Airport.

Closed American Airlines Group Inc. check-in counters behind plastic barriers inside Terminal 4 at Los Angeles International Airport (LAX) in Los Angeles, California, U.S., on Thursday, Aug. 13, 2020. Airline passenger numbers in the U.S. totaled 559,420 on Aug. 11, compared with 2.31 million the same weekday a year earlier, according to the Transportation Security Administration. Photographer: Bing Guan/Bloomberg via Getty Images