The FAA had to activate a contingency plan, a Debris Response Area, after the explosion. Instead of one rocket, you have an expanding cloud of debris that takes varying time to descend. Some planes had to enter a holding pattern to stay out of the area, while others delayed takeoff.

https://www.reuters.com/technology/space/spacex-launches-seventh-starship-mock-satellite-deployment-test-2025-01-16/