Since it is a hybrid model game, India will have the most advantage in playing this model. India has been playing at the same ground since the beginning of the tournament but the venue seems to be changed in every match of the opposing teams of India. Since India have played multiple matches on the same ground and are following the same ground, they will have a good idea about the ground conditions and the behavior of the wicket which other teams will not get. Besides, another advantage for India is that India does not have to travel thousands of kilometers after each match, and India is physically and mentally fit enough, in which case the final match will definitely be difficult for New Zealand. Before starting the match, I must say that the final match is actually very likely for India to win. New Zealand have been an unlucky side in the finals, they performed well from the beginning of the tournament to the finals and semi-finals, but in the finals they did not play at their best. If something like this happens in the Champions Trophy final against India, we have to assume that this team may never win a major tournament.
Well... there is no question about it. Every other team had to travel from one country to the other, and the Indians were not required to do that. And it is not like these countries are adjacent. For example, Rawalpindi lies close to 2,000 kilometers away from Lahore. And this means that players had to spend 5-6 hours in travelling one way. On the other hand, the Indian players hardly stepped out of their hotel room in Dubai. Also, remember that India participated in the first semi-final.