Record-breaking holiday weekend travel at JFK Airport was grounded Saturday night by a “minor water leak” at the airport’s control tower, officials said.

Hundreds of departing and incoming flights were canceled or delayed at the international transit hub, the Port Authority’s online flight tracker showed at around 10:30 p.m.

“JFK controllers are operating from a secondary control tower due to a minor water leak in the main facility,” the airport tweeted just before 7 p.m.

“Operations at this facility, combined with area weather, require more spacing between aircraft. As such, the FAA is holding most flights...