Just a note that the schedule is only fixed (more or less) through March 1st. I wouldn't put a lot of confidence in anything for March 2nd and beyond as it is largely placeholder pre-Covid schedules (particularly for domestic). DL did their major gut job through March 1st a few weekends ago --
https://www.airliners.net/forum/viewtopic.php?t=1454233. With some more modest cutting in Jan/Feb over the last couple weekends. That's why you see 5x daily flights on JFK-LAX on March 1st and 9x on March 2nd. The March schedule will almost certainly see significant cuts once we get closer and DL loads in the March schedule updates.
UA updated theirs through Jan 31st last weekend. AA/AS schedules were cut through Feb 10th a few weekends ago.