Your scenario is perfect for conducting a FRAT, which is an acronym for Flight Risk Assessment Tool.
The FAA started a paper-based FRAT checklist many years ago. Then an aviation safety company called NorthWest Data Solutions in Anchorage, Alaska created an electronic version of the FRAT that integrated into their aviation safety management system software.
You can't transfer an approval so yes, you need to get a new one. From AFSP's Application Guide:
TSA cannot transfer your training event request from one flight training provider to another flight training provider. TSA approval is
valid only for the flight training provider listed on the training
You may desire to build more ...
It depends on the operator's "opspecs" which are negotiated between them and the FAA. Generally in the US the vast majority of part 121 scheduled airline operations are required to be IFR, but plenty of part 135 charters are permitted to fly VFR. They may be subject to weather minimums higher than the general VFR limits.
There are subscription based services by companies like Jeppesen and Lufthansa that provide such data, at a price.
Free data is only available in more cumbersome formats like PDF documents and websites. Handy for looking up individual airports for your trip planning but not for automated data mining.
I have found something that will work. It is not pretty and I swear I can still smell the punch cards that produced the text files, but here it is:
It is free, it appears to be updated by the FAA, (I verified it has the current frequency for my local VOR that I know changed 2 ...
"International" is supposed to be a code word to inform pilots and ATC that the Border Guards have a presence, and can admit you into the country: stamping passports, collecting duties, all that stuff.
What you shouldn't do, say, is fly from Canada into Oswego County Airport, rent a car and drive over to Syracuse Hancock International to clear Customs/...
That information can be found on FAA.gov
You can use the FAA's search tool rather than manually look in a copy of the chart supplement.
However, updated PDF copies of all of the chart supplements are hosted by the FAA here.
There is no US regulation about whether an airport can be called "international." The Secretary of the Treasury designates the official list of international airports of entry. But not all airports on this list are even called international, and it does not include all airports with international flights. There are even some airports called "international" ...
It is defined by the ICAO in this glossary:
International airport. Any airport designated by an ICAO Contracting State in whose territory it is situated as an airport of entry and departure for international air traffic, where the formalities such as customs, immigration, public health, agricultural quarantine and similar procedures are carried out.