AMRITSAR , Dec. 5 -- Passengers at many airports in the north continued to face inconvenience for the third straight day on Thursday as IndiGo's nationwide operations remained disrupted due to large-scale delays and cancellations. Nine Indigo flights were cancelled at Sri Guru Ramdas International Airport in Amritsar. "As many as 20 flights were delayed," said airport director SK Kapahi. At Jammu airport, passengers expressed frustration as flights to Delhi were repeatedly delayed. A passenger said, "My flight from Jammu to Delhi has been delayed by four hours. I don't know if the flight will depart today." HTC...