What paper work do I need to travel to mexico via airplane???

My mother n law has her green card here and she is wanting to travel to mexico to visit her family there, what all does she need to travel to mexico via air plane??? I know she will need her pass port but does she need anything else she she is a permanent resident here????

you can get the passport but when you start coming back it will be hard for her because there can always be problem when the person is not a u.s citizen.

She should bring both her passport and her green card.

I'd give you the state department link, but of course that ability is currently not working on YA.