This scheduling reduction will go into effect on May 17, and will last until Oct. 24, according to the FAA’s order.
The airport has not yet publicly shared information about what flights the order could impact. O’Hare did not immediately respond to TIME’s request for comment.
United told TIME in a statement that it was grateful to the Department of Transportation and the FAA “for leading the process to find a solution that makes sense for everyone who cares about O’Hare’s success.”
“We are reviewing the FAA order and will share additional information, including any next steps, as soon as our review is complete,” the airline said.
American also thanked the federal transportation agencies in a statement.
“Once implemented, the FAA’s action will improve reliability and reduce delays for customers traveling from, to, and through O’Hare this summer,” the carrier said.
In a memo to its Chicago-based staffers that was shared with TIME, American shared its initial estimates of the impact of the FAA’s order, based on previously published schedules: while American said it will have to cut no more than 40 flights—including those arriving at and departing from O’Hare—per day, it expects that United will have to cut about 200 flights per day during peak times.
