Taj group of hotels a.k.a Indian hotels pvt. ltd. is the 
largest hotel chain in india.
But the grand group of hotels a.k.a Bharat hotels pvt.ltd
is largest hotel chain owned with complete majority.
For more citation founder chairman of this chain was Mr. 
Lalit Suri now he is no no more died last year on 10 oct.

Leading airline of the world is no doubt about American 
Airlines in all aspects........second leading airline is 
France Airlines.

Leading Airline in india is jetLite after collaboration of 
jet Airways and Air Sahara...but due to some reason this 
collaboration is called off.
on the second thought Air india holding the place.