Two Kingfisher flights were delayed, one of them due to technical problem of the aircraft, at the N S C Bose International airport here today.Airport sources said the Kolkata-Imphal flight IT 4805 was delayed as the pilot detected a technical problem in the engine during a routine check before the scheduled 8 am departure from here.With another aircraft of the same airlines having been arranged, the Imphal flight finally left in about one and half hour’s time, sources said.Meanwhile, the Kolkata-Mumbai IT 512 flight was delayed for over two hours due to late arrival of the corresponding flight, sources said.Though the Mumbai flight was scheduled to leave at 9:30 am, it was delayed to 11-45 am as the connecting flight landed here late, the sources pointed out.