Do not transit via Delhi. Regardless of amount of time you have during transit you will end up spending 90% of the time at the transit area. I had heard about the problems at the old airport but I was hoping that they would have implemented new transit policies for the new airport - wrong. During inbound and outbound flights I was able to get out of the transit area mere 45 mins before my flight. And if you have a long layover you are stuck in this place with one small food stall where food is bad. No where else I have ever had to spend pretty much locked up like in a jail cell during transit. Even though they have build a nice looking airport the ones transiting via Delhi will never get to explore the airport taste some Indian food purchase gifts and so forth.