Yeah dude, of course. Airplane's don't just fly anywhere. It's controlled airspace, guided and auto pilot routes.
For example, a 9am departure could see up to 20 planes departing in succession for the east coast and another for the West. They'll have a route and each one will follow one after the other.
By the time it's 10am, 40 planes have left and 40 have landed. 80 planes of jet fuel, gases, exhaust etc.
Defo "chemtrails" but not in the way of "spraying" . The only place I ever experienced heavy chemtrails was in Barcelona and you can only imagine the air traffic to that city