Private airlines IndiGo, Spicejet, Vistara and GoAir have re-opened passenger bookings for flights starting mid-May in violation of aviation regulator DGCA’s explicit order.

“…all airlines are hereby directed to refrain from booking tickets… Further, the airlines may note that they shall be given sufficient notice and time for restarting of operations. This is for strict compliance by all airlines,” DGCA Deputy Director General Sunil Kumar wrote to all domestic and foreign airlines on April 19.

– Business Today, April 27, 2020

GoAir and SpiceJet will restart domestic flights in mid-May, as well as some international flights (to Dubai and Singapore) from June 1. IndiGo and Vistara will start from June 1.