NEW DELHI/ MUMBAI — Nearly 80 domestic and international flights received bomb threats in less than 24 hours that later turned out to be hoaxes, keeping thousands of passengers and security agencies on tenterhooks. The estimated losses incurred by airlines due to the disruptions would be around INR 600 crore, according to two former airline officials. On Tuesday alone, around 50 flights, including 13 each of IndiGo and Air India received bomb threats. Akasa Air got the threats for over 12 flights and as many as 11 flights of Vistara also received the threats, the sources in the know said. Around 30 flights of IndiGo, Air India and Vistara got bomb threats on Monday night, they added. In nine days, more than 170 flights operated by Indian carriers have received bomb threats, mostly through social media, that also forced the diversion of some of the international flights. Also read: Coast Guard on high alert after cyclone forecast, mobilise assets to respond to any contingency On average, disruption to a domestic flight would cost around INR 1.5 crore while the expenses would be around INR 5-5.5 crore for an international flight, an official, who has worked in the finance department of...