I don't know much about US airlines but Cathay Pacific made a record breaking profit this year and they aren't even at full capacity https://www.bloomberg.com/news/articles/2024-03-13/cathay-pa...
https://www.google.com/search?q=Cathay+Pacific+stock&oq=Cath...
https://www.reuters.com/business/aerospace-defense/cathay-pa...