In late April, two aircraft narrowly avoided collision on Ronald Reagan Washington National Airport ‘s (DCA) runway, which is already the nation’s busiest.

New Federal Aviation Administration data show the danger of adding flights to DCA.

U.S. Sens. Mark R. Warner and Tim Kaine , both of Virginia, and Sens. Ben Cardin and Chris Van Hollen, both of Maryland, shared the FAA data which demonstrates the detrimental impacts adding more flights at an overburdened DCA would have on flight safety and timeliness. New flights were approved by the Senate Committee on Commerce, Science and Transportation and may be included in this year’s final FAA reauthorization bill.

“Just last week, two planes came within 300 feet of colliding on DCA’s runway – a frightening and visible demonstration that DCA is at capacity. Thankfully, there was no loss of life – this time. But this new analysis from the FAA demonstrates conclusively once and for all that passengers simply cannot afford for Congress to further meddle in airport operations by jamming more flights onto DCA’s already-overburdened runway. Our colleagues should listen to the FAA and the Metropolitan Washington Airports Authority and heed the warning light of last week’s near collision. There is no reason to compromise the safety and timeliness of 25 million passengers for the benefit of a few members of Congress who want more flights into DCA,” the senators said in a statement.

DCA averages 819 overall daily commercial takeoffs and landings on a singular main runway. Designed to accommodate 15 million passengers annually, in 2023, DCA saw 25.5 million aircraft passengers come through its doors. In 2022, the airport had the third-worst cancellation rate among the nation’s busiest airports.

The new FAA data underscores the urgent need to reject any changes to slot and perimeter rules, which govern the number and distance of flights that can safely operate out of DCA. In February 2024, the Senate Committee on Commerce, Science, and Transportation approved changes to the current slot and perimeter rules to increase the number of flights in and out of DCA as part of the Senate version of the Federal Aviation Administration (FAA) Reauthorization Act .

The senators have repeatedly opposed changes to the slot and perimeter rules. In March 2024, they sent a letter to the Chairs and Ranking Members of the Senate Commerce Committee and the House Transportation & Infrastructure Committee opposing any changes to the rules in the FAA reauthorization. They penned an op-ed in June 2023 urging their colleagues to oppose changes to the rules.