India, Dec. 6 -- For three days now, 29-year-old Supriya Singh has been criss-crossing Delhi's Indira Gandhi International Airport's Terminal 1 with her one-year-old daughter in her arms, caught in the swirl of IndiGo's spiralling flight disruptions.

Singh, travelling from Varanasi, had a connecting flight from Delhi to Surat on Wednesday. "Since then, I have been wandering around the airport trying to figure out how to get home, tracking down my luggage - which is still missing - and taking care of my daughter. Her health is being affected as she is not getting proper food, milk or water here," she said.

Singh, with her crying daughter in her arms, scrambled through the many anxious passengers gathered to demand rescheduled flights, up...