Sanchez is poised to quit the Emirates this month having refused to put pen to paper on a new Gunners deal.
And United has emerged as his most likely destination after Manchester City dropped out of the race to get him on-board.
Red Devils supporters are eagerly awaiting confirmation of a deal which will see Henrikh Mkhitaryan go the other way.
And Manchester Airport have now cheekily revealed they are on red alert for when Sanchez flies up to the north west.
A United fan tweeted: “Can you please announce @Alexis_Sanchez to @ManUtd??? @manairport”
And the airport’s verified Twitter account replied: “We’ve got our eyes pealed (sic) [winking emoji].”
The Sanchez transfer saga is not the first to see an airport embroiled in it.
Liverpool’s swoop for Mohamed Salah had Reds supporters avidly using flight trackers last summer.
The Merseysiders were also said to have met Virgil Van Dijk at an airport to talk terms.
Express Sport will be the first to let you know if Sanchez has been spotted stepping off a private jet at Manchester Airport.
And you can follow all of the latest Sanchez transfer developments right here via our dedicated live blog.