The spate of flight cancellations, which began on Saturday last week, continues unabated at IndiGo. Tuesday was the fourth consecutive day when the low-cost airline, which operates the largest network of flights in the country, cancelled 30 flights from major airports, including Kolkata, Hyderabad and Bengaluru, thus inconveniencing a large number of passengers. Sources alleged that the airline was forcing passengers to either buy last minute fares or it was offering them alternate flights with one-stop connectivity with a long transit time.