Originally Posted by Paulchili

I don't imagine there is immigration at T4 (or is there one?) thus all international flights have to arrive at TBIT for passport/customs. 2 hours in LAX is pushing it unless you can get through customs faster (Global Entry, etc).
I know I have always arrived at TBIT but I could be wrong.
I would allow more time for both connections (LAX & DFW) if you can, to reduce the stress factor with possible late arrivals, etc
YMMV