A Manchester Airport spokesman said the Pakistan International Airlines (PIA) flight had been due to land at 1:30pm, but was diverted to London Stansted "where the authorities are investigating".
The spokesman said: "The plane - flight number PK709 - was travelling from Lahore and had 297 passengers on board.
"For further information for friends or family who were due to meet the flight at Manchester please call 0800 140 4007".
More top news
After a remarkably mild November - a notable mild start to the new month.
The Facebook founder revealed the plan as he and wife Priscilla Chan announced the birth of their baby daughter, Max.
At least 300 people are actively promoting and recruiting for the terror group from within the United States, academics have found.