Plans to increase passenger numbers and change weekend flying times at London City Airport have been opposed by the London mayor's office.
Arrivals and departures are not allowed at the airport between 12:30 BST on Saturday and 12:30 on Sunday.
Airport management want to operate flights until 18:30 on a Saturday, under plans submitted to Newham Council.
Deputy mayor for planning, Jules Pipe, said it does not fit the London Plan.
The proposal for the airport also includes increasing passenger numbers from 6.5 million per year to 9 million and allowing up to 12 more arrivals between 18:30 and 19:30 in British Summer Time.
But it is not looking to increase its 111,000 annual flight limit.