Thanks -that page is actually very helpful. I checked out a few destinations and found more availability than I'm used to seeing on AA.
I looked on UA and found this page
https://www.united.com/web/en-US/con...averaward.aspx
seems very similar to AA, with even greater flexibility because it allows you to set departure city and looks farther ahead.
Didn't find anything similar on Delta though...not surprised.