cheap flights from hyderabad to delhi ?

hi ,
i want to fly from hyderabad to delhi in the first week of april.
as my budget is low , i am looking for low price flights.
when i saw a couple of day's back on net, price was around 2500 Rs. today it is 3300 Rs. i am shoched for the difference. can anybody please let know should i book the tickets now only, or wait for some time so that any discount offers will be there.
as i don't have any idea regrding the airline..etc.. and this is my first time air travel ..please advice me the best way so that i can get the tickets @ low cost.
thanks..

Try ixigo.com. Have found it good.

Can't say about waiting for cheaper fares. My sense is that things will not improve in the airline business anytime soon.