Flights between cities in red zones: Will the government allow flights among cities in red zones? Most of the big cities like Mumbai, Delhi, Kolkata, Ahmedabad, Surat, Vadodara, Chennai etc are marked as red zones. The MoCA’s guideline says that limited flights (one-third) will begin from May 25 and “further augmentation of flights will be done in a calibrated manner.” “Once the government announces the schedule, it will become clear whether the operations will be resumed from all cities or only within cities in green zones. That’s why the Minister has said that the resumption will happen in a calibrated manner,” Jitendra Bhargava, an aviation expert, says.