I'm not sure how it will be profitable for them, but it's there. I'd like to take a flight from them from TTN.
Can you get to airport from.west trenton line?
"It has shown me that everything is illuminated in the light of the past"
Jonathan Safran Foer
I was wondering the same thing, eldondre. It's about a mile from the West Trenton station to the airport, and there appears to be sidewalks on Grand Ave and W Upper Ferry. Google times it at 1 hr 20 min from Market East, including the walk. I can't imagine there are cabs available at the train station, though Mercer's website claims that "taxi cabs generally stage outside the front of the terminal. If one is not available, local taxicab phone numbers can be found near the public telephones inside the terminal." If you wanted to avoid the walk, you could train into Trenton, take a cab from there ($12), but then take Trenton West home.
I can't imagine too many scenarios where flying from Trenton would make enough sense for city dwellers given that most of the destination cities are pretty well served from PHL, but not a bad idea to keep in the back of your mind.