IndiGo on Wednesday said it will operate additional flights on Delhi-Leh, Delhi-Srinagar and Lucknow-Pantnagar routes from July 1 onwards due to increased demand. “We are pleased to strengthen our network by adding frequencies on Delhi-Leh, Delhi-Srinagar and Lucknow-Pantnagar routes, catering to increased demand for travel to Ladakh, Uttarakhand and Kashmir,” Sanjay Kumar, Chief Strategy and Revenue Officer, IndiGo, said in a statement.