I've had flights that were delayed, and then during the start of the boarding process, we had to stop and switch to a different aircraft, because the delay meant we'd be too loud for the noise curfew when we arrived, so we needed to take a quieter plane. That was a domestic flight into a small airport (LGB), but I imagine there's something to manage total flight volume in general; there's certainly exception handling to delay or cancel departures when the destination airport is unlikely to be available due to weather.