Be very careful when you book flight ticket. I personally had very bad experience when I tried to re-schedule the flight.
Read their terms and conditions carefully.If its said Discount, check price in the direct flight web site iteself. This discount amt is cheat. My flight ticket in Kingfisher was say 2500. In yatra the price was 2800-300 (discount) = 2500.
But when you cancel, this 300 is charged against you. Good trick to suck your money right! be careful. But you may ask me why did I book in Yatra. Bcos I thought I get miles..:((
Other deduction are clearly said in the Terms and conditions. Read carefully, book only if you are very sure on the date and timing of the flights.
Wish you all happy and safe journey.