Important trip coming up and AirAsia happens to be your preferred airline? Then book your flight tickets with HappyEasyGo and save up to 6 per cent of your airfare. Yes, that is right. You can save up to Rs700 on your AirAsia flight booking by simply entering the airline booking coupon code â HEGI5M â at the time of booking. HappyEasyGo also offers you free flight booking cancellation and flight rescheduling. Visit the HEG website and app right away to unveil a world of the best flight booking and hotel booking deals.