You didn't need a passport to go there, so it's domestic.
US citizens can still go to Mexico without a passport. I am pretty sure that is not domestic![]()
But can they COME BACK without a passport?![]()
It is easy to check whether the travel was domestic or international: if there was no passport control, then it was domestic.
US citizens can still go to Mexico without a passport. I am pretty sure that is not domestic![]()