Hoping someone can put my mind at ease. I, with 3 teenage children in tow, have a flight from Sydney to Dallas to Cancun. We then have an onward flight to Mexico City with a different airline (Volaris). Eveything looked doable but I have recently been advised that the flight from DFW to CUN is scheduled to depart 1 hour later thus meaning that we will not have enough time to collect luggage and clear immigration/customs and check into our Volaris flight. There is a later flight with Volaris but with a gap of only 2 hours will we have enough time to transfer from the international flight to domestic?

Thanks