Persons on the US no-fly list are not only unable to fly to the US (obviously), but to board a flight which might enter US airspace e.g. in an emergency. Is there any way or online resource to find out which flight paths particular flights use, and which flight paths have or do not have the potential to be redirected to US airspace?
Edit for clarification: Thank you all for the resources. I am specifically looking for flights (or information on flights) which will not enter US airspace including (to the extent foreseeable) on an emergency basis. I am assuming that whether or not a flight will or might enter US airspace is foreseeable and part of the organization of commercial flight-paths?