Indigo airlines it is one of the cheapest airline on india for economy class . I took a flight from bhubhneshwar to kerala. Which is a conneting flight bhubhneshwar to banglore then banglore to trivandrum. Flight was very nice and very comfortable to me which is on time with no delay . As I got a call from indigo that your flight has been cancelled after booking the tickets but they give me a option on the same day or other as I wanted.