I rarely prolong a thread where a difference of opinion has the potential to offend, but I can see how your expectation was way beyond what I would have guessed. I have have an international airport in my area, but I think Tony Alviar summed it up well: "I can't vouch for what you will pick up at the airport" In the case of Pittsburgh area, there are a very large number of systems, so weeding out the list of potential candidates might be a challenge, assuming that someone would have enough airport specific knowledge.
In the past I have even received files to use from other people that way it is all set up.
You mean someone created a set of files that was specific to the airport area?
If someone asks the question that is going to visit my area I just point them to the website in my sig, there you will find both .P500 files and .P96 files for anyone to download.
I didn't see any anything that looked like a file for the Charlottesville-Albemarle Airport (CHO) area.
OK, so I went over the top on that comment, but I am trying to make the point that most people have files for their area of interest, and it is unlikely that they would coincide with the area that a
portable would pick up at the airport.
I know you were "just looking for suggestions", and I hope my response didn't turned off anyone who would be willing to do this. If so, I am sorry. Hopefully, Tony Alviar's advice will allow you to decide what to download from RR...at least you have enough room in your PSR-500 for things that may not be close enough to enjoy.