Not quite - on DL the link is available right after you select your flight(s) and it's much less hidden. In the flight summary at the top of the page, like where it says "Changeable / Non-refundable", you can click that and you'll get a pop-up where you can see the rules. There's also a link in the fine print toward the bottom of that page.

On AA.com, the link is only in the fine print, and only AFTER you've entered the passenger information, selected seats, and are on the page where you enter payment information and select "Purchase."

DL definitely > AA on this!