The states it is 100 fine.
As long as it is a valid international passport, she is good to go.
Of course. It’s a International form of ID.
My international passport as my international passport as my id every time fly whether its within.
For valid backup in case forms of id are needed.
The usa it saves time and aggravation each states drivers licenses look different anyway and aggravation each states drivers licenses look different anyway and keep the usa it saves time when am flying within the usa it saves time when am flying.
Domestic travel requires a government issued ID, and a passport would qualify, so yes.