All of the examples are within Europe by European carriers. The EU allows for this under a special agreement. No one had listed (I'm not saying they don't exist just haven't seen it yet) a foegeign carrier flying within one country.
This is what some on this site are advocating to open the U.S. Domestic market.
A foreign airline or person can invest in a U.S. Airline they can only own 49% though.
Again we are talking apples and oranges.