Passengers flying Singapore Airlines (SIA) from Singapore to Kolkata last Friday (June 8) had a harrowing time as they first had to wait on ground — inside a bus — for a long time, followed by another wait inside a hot aircraft in the humid city before they could finally take off for the city. The flight, SQ 516, has a schedule departure time of 9.10pm, took off that day just before midnight and the delay saw heated exchanges inside the Airbus A-330 on ground at Changi Airport.