US Flight Plans / Slots
Mornin' all...
There are a number of tools that you can use to monitor flight plans, slots etc. for US flights.
For simple visual tracking of a flight then flightaware.com or flytecomm.com are pretty good. These wont however give you any indication of EDCT's (Estimated Departure Clearance Times - the US equivalent of CTOT's).
To check to make sure a flight plan is live on the system you can contact the appropriate ARTCC to obtain the CID / Strip Number. If there isn't one then generally that means there is no flight plan in the system and you may have to refile.
Once the plan is filed it will be subject to any applicable Ground Delay Programs or Airspace Flow Programs. The EDCT can be obtained electronically if you have a connection to the FSM (Flight Schedule Monitor - the US (kind of) equivalent of CFMU), or via fly.faa.gov/edct if you don't.
If there is an update to the EDCT the flight crew will be notified when they make contact with tower for their clearance.
You can also use the OIS (Operational Information System) and ATCSCC (Air Traffic Control System Command Center) via the FLYFAA website for information regarding ground delays/ground stops/airspace flows that are in affect.
Hope this helps...
Buzzz