I'm flying from El Paso to DFW in the morning and DFW to CUN in the afternoon. I made 2 reservations through BA because it was less miles than AA. When i tried to book El Paso to CUN it wouldn't let me so that's why i did two bookings. My question is does anyone know if I talked to the AA representative (El Paso) when I check in will the AA agent be able to check my luggage all the way to CUN instead of DFW. I don't want to get my luggage in DFW and then go through the hassle of checking in and TSA again. Thanks

Both reservations are through AA.