this has been said many times here already. you may not know until a day or so before.
but if you are flying from DFW, you will not be flying. they have already been clear that route is suspended for now. if you want any certainty you need to fly from MIA
I spoke to an AA rep yesterday. She said that flights to and from DFW to EZE are still operating but are sold out until September. That is why they do not appear online at least until September. Those passengers who are flying to DFW can only book a flight to Miami and change there for DFW. Anyway she was quite clear that flights to DFW have not been suspended so if she is wrong, please tell me the source of your info. Thanks.