Domestic to domestic transfer at DFW, then 1:20 is acceptable and AA is unlikely to be convinced otherwise. Even if changing terminals, the new Skylink provides regular, quick transfers without the need to go through security screening. You will only have problems making a connection if the inbound flight is quite late.
I disagree - AA in BNE are generally quite accommodating for such changes, especially if you have not yet agreed to them.
For me, 1½ hours is the minimum I would be happy with. Normally you have the option on-line to confirm agreement to such changes on line. I would not use this; I would research my preferred alternatives and have them ready when ringing up to fix.
There are far too many things that can go wrong and DFW is huge, many gates are a 5 minute trot from one of the Sky link Stations.
Two years ago we had a 1:25 minute scheduled connection at DFW
¹.
Boarded and left the gate on time at LGA, but the aircraft pulled to a holding bay while the pilots had to "re-compute weights" for approval This took 20 minutes.
We landed 25 minutes late and there was a 10 minute taxi to the gate, where, there was already another aircraft. We waited another 25 minutes before the gate could be accessed. Fortunately we were in First class but still, we got off the aircraft 25 minutes before the SEA flight was due to depart. On checking the monitors it was shouwing as on time and boarding.
Here's the killer - we arrived at gate C29, our SEA flight was departing D28 (See map below). We had a 5 minute stride to the station at C30
², just missed an anti-clockwise train and took the next going the other way; alighting ~6 minutes later at the Northerly D station; came down the escalators at D24; another 4 minutes saw us at the gate with only a few stragglers. We fell into our First class seats after scrambling to find somewhere to put our luggage (my bag ended up somewhere around row 10) about 10 minutes before departure.
¹ LGA-xDFW-SEA; this was rebooked for the day after flights were cancelled out of NYC due to lightning & we would not make our 2¼ hour connection at ORD that evening.
² Note there are two Skylink train stations in each terminal. The symbols on the map show where the escalators to the station can be accessed, not where the actual stations are.
