Southwest passengers and airliners line up and move at Love Field in Dallas, Thursday, July 25, 2024. Southwest Airlines said Thursday that it plans to drop the open-boarding system it has used for more than 50 years and will start assigning passengers to seats, just like all the other big airlines. (AP Photo/LM Otero)
A passenger checks in for her Southwest Airlines flight at Midway International Airport in Chicago, Thursday, July 25, 2024. Southwest Airlines plans to drop the open-boarding system it has used for more than 50 years and will start assigning passengers to seats, just like all the other big airlines. (AP Photo/Teresa Crawford)
FILE - American Airlines passenger jets prepare for departure, July 21, 2021, near a terminal at Boston Logan International Airport in Boston. (AP Photo/Steven Senne, File)
Travelers board a Southwest Airlines plane to depart from Love Field in Dallas, Thursday, July 25, 2024. (AP Photo/LM Otero)
FILE - A woman waits for her flight as an American Airlines jet passes by at Sky Harbor airport on March 4, 2023, in Phoenix. American reports earnings on Thursday, July 25, 2024. (AP Photo/Charlie Riedel, File)
FILE - Southwest Airlines Boeing 737 lands at Manchester Boston Regional Airport, June 2, 2023, in Manchester, N.H. (AP Photo/Charles Krupa, File)
Southwest Airlines planes can be seen on the terminal at Baltimore/Washington International Thurgood Marshall Airport in Baltimore, Friday, July 19, 2024, in Baltimore. (AP Photo/Stephanie Scarbrough, File)
A passenger checks in for his Southwest Airlines flight at Midway International Airport in Chicago, Thursday, July 25, 2024. Southwest Airlines plans to drop the open-boarding system it has used for more than 50 years and will start assigning passengers to seats, just like all the other big airlines. (AP Photo/Teresa Crawford)