IndiGo airline on Friday announced that it is extending free waivers on cancellations of tickets till March 31 for flights to and from the Middle East and Istanbul, Turkey. IndiGo said it is closely monitoring the developments across the impacted region and continues to publish real-time updates on its website and social media channels. IndiGo on Wednesday said it cancelled over 500 flights to the Middle East and select international destinations from February 28 to March 3 due to the evolving airspace restrictions over Iran and other Gulf countries.