Originally Posted by
FWAAA
You may have to change concourses, as the new terminal contains a satellite concourse connected by an underground walkway (escalators and moving walkway) under the AA tarmac plus the concourse directly connected to the curbside checkin area. Easy walk (at least for me) - although some violently disagree. Have a great trip.

It's all about clearing security. I consider a walk from one end of A to the far end of C or D at DFW to be a very pleasant walk...because it's all inside security. No uncertainty at all.
Cheers.