Endlesshonnon posted a link about Schiphol landing restrictions this summer. Contained in the link was this information about Linate Airport closure.
“Due to runway maintenance, Linate Airport will be closed from 27 July 2019 to 27 October 2019. Because of this, all our flights to, from or via Linate Airport on these dates are cancelled. We apologise for the inconvenience. Our flights to, from or via Milan Malpensa Airport are unaffected.”
They sure picked a strange time of the year to close the airport.