Hello guys,
I'm thinking if i need to travel to Mumbai from delhi by flight, is it possible to take my f450 quad ? With 3 or 2 lipo batteries 5000mah each :

No reply?

Nothing from Delhi airport bro. They are the strictest in India. Sometimes a knowledgeable person would see the numbers on your battery, do the math and allow based on the watts but sometimes an arrogant person would just not listen and wont allow any kind of lipo batteries

Oh okay
so the only option left is travel in train 

yes, be safe. And this is for now only Delhi airport, you are safe if you flying to Delhi and not from Delhi