According to an article in the Wall Street Journal, American Airlines expects to approach pre-virus flight levels. From the article:
Airlines raced to rebuild their networks as it became clear that the economy was revving up and people were ready to get back to traveling. American, currently the world’s largest airline, was among the most ambitious. Within the U.S., American plans to fly nearly as much this summer as it did before the coronavirus pandemic.
This certainly jibes with my recent SLF experience at SeaTac. Here's a link to the article:
https://www.msn.com/en-us/travel/new...mM9?li=BBnb7Kz