depends on arrival gate and departure gate, read this thread

https://www.flyertalk.com/forum/american-airlines-aadvantage/1703026-aa-guide-dfw-dallas-fort-worth-international-airport-mct-connection-etc-109.html ............................................................................................................................................................................................................... This site is not friendly in posting link. Copy the URL link that is above the dotted line to go to Flyertalk AA Guide, DFW MCT Connection. You should read from the LAST page go backward, to get the latest information such as the Skytrain was down a while back but is up and running now. DFW MCT if I remember correctly is 45 min.  So 50 min should be enough and that is why if it is on same ticket it is considered a "legal connection". There is a distance between 2 Skytrain stations.  DONT follow its signs but PAY attention on the location of your arrival gate, how far it is to the departure gate, whether it is in the middle of the 2 Skytrain stations (the worst) or close to a station even just walk back a short distance... Since the arrival gate and departure gate are all unknown until the real time happening, the only thing you should / need to do, is get a good idea on the lay out of the terminal as to the gate positions in relation to the Skytrain stations.