FILE - In this Dec. 31, 2020 file photo, a Southwest Airlines jetliner taxis down a runway for takeoff from Denver International Airport in Denver. Southwest Airlines plans to raise minimum pay to $15 an hour for about 7,000 employees, citing the need to attract and keep workers as the airline industry continues to recover from the pandemic. Southwest said Friday, June 25, 2021, that it intends for the raises to take effect on Aug. 1. (AP Photo/David Zalubowski, File)

FILE - In this Wednesday, June 16, 2021, file photo, a Southwest Airlines ticketing agent helps a traveller at the check-in counter at Denver International Airport in Denver. Southwest Airlines plans to raise minimum pay to $15 an hour for about 7,000 employees, citing the need to attract and keep workers as the airline industry continues to recover from the pandemic. Southwest said Friday, June 25, that it intends for the raises to take effect on Aug. 1. (AP Photo/David Zalubowski, File)