If you fly a lot, you might also be aware of the National Airspace System Status: https://nasstatus.faa.gov/
It also has links to a lot of other information useful for people in the airline industry.
I find the Airport Arrival Demand Chart to be good for seeing a big picture of all the flights: https://www.fly.faa.gov/aadc/
The equivalent for Europe is probably https://www.public.nm.eurocontrol.int/PUBPORTAL/gateway/spec... (at least what I use when there is major disruption).
And here's Canada's: https://spaces.navcanada.ca/workspace/ois/
I've never seen the nasstatus page, but I have seen the OIS page, which I use frequently when experiencing delays to find out what's going on: https://www.fly.faa.gov/ois/?legacy=true
The links on the NAS page are also really good. nice share!