What has now become a ‘routine’, technical and operational reasons again led to either cancellation or delay in the departure of several flights from Karachi’s Jinnah International Airport on Tuesday.PIA’s flight from Karachi to Lahore, PK-306, PIA’s flight from Karachi to Sukkur, PK-536, the airline’s Karachi to Islamabad and Karachi to Najaf flights PK-368 and PK-334, respectively were cancelled. Similarly, the national flag carrier’s flight from Karachi to Quetta PK-310 was delayed by two hours. Likewise, SereneAir’s Islamabad-bound flight ER-504, and the airline’s two Lahore-bound flights ER-522 and ER-524 were also cancelled. PA-200, Airblue’s flight from Karachi to Islamabad, was cancelled as well. AirSial’s Karachi to Lahore flight PF-143 was also cancelled.