Budget airline IndiGo has announced a hike in cancellation charges by 500 rupees for flights cancelled three days before departure. The charges remain the same in case of changes made four or more days in advance of the travel dates, said the company in a statement. Effective from the 1st of July, the cancellation cost for domestic flights and international connecting flights within the sub-continent will now be Rs. 3,500 and any changes will cost you Rs. 3,000.