Originally Posted by
skblu
Where do you have evidence of that? I’ve heard of plenty of airports having gate space and operational limitations but never “ATC saturation” being a thing.
Poorly worded. I meant airport service volume and ATC at the terminal level. EWR for example is a zoo on a good day. Hub ATC can only handle so many blips per hour but the airspace in between still has some room. Adding flights isn’t an option at many hubs due to congestion, so the next option is to increase the size of the aircraft currently operating the routes.