Pakistan International Airline (PIA) has announced that it will operate four international flights on humanitarian grounds to facilitate safe return of the stranded passengers. According to a PIA spokesman, the national flag carrier will operate three flights to the United Kingdom (UK) and a flight to Toronto in Canada. PK 781 (Lahore-Toronto) will take stranded passengers on March 27 while PK 709 (Islamabad-Manchester), PK 757 (Islamabad-London) and PK 9757(Islamabad- Birmingham) will be operated on March 28.