Came across this blog with this post on my travel agents website has been really helpful thought it would be a good idea to share with all NRI's travelling to India.
I am generally very late in booking tickets and always land up paying far too much.
01 Jan – 15 Jan By mid Nov
16 Jan – 31 Jan By mid Dec
01 Feb – 15 Apr Jan onwards
16 Apr – 10 May Feb onwards
11 May – 31 May Feb onwards
01 Jun – 10 Jun By March end
11 Jun – 15 Jul By March end
16 Jul – 31 Jul By April end
01 Aug – 15 Aug By May end
16 Aug – 31 Aug Jun onwards
01 Sep – 15 Sep May onwards
16 Sep – 10 Oct Jun onwards
11 Oct – 15 Nov Jul onwards
16 Nov – 30 Nov Jul onwards
01 Dec – 10 Dec By mid Jun
11 Dec – 15 Dec By mid Jun
16 Dec – 24 Dec By mid Jun
25 Dec – 31 Dec By Jun end
Hope it helps other folks like me!
Source: Travelopod