Trenton - Mercer County Airport - TTN
Delta/Comair began service to/from Trenton's airport in December 2006. There are two flights per day to Boston, and one to Atlanta.
This is a VERY convenient airport to Northern Philadelphia and Central New Jersey. There are NO parking fees here, you just park and walk in.
The River Line
Trenton's New River Line light rail system now goes all the way to Camden, NJ!! (right across the river from Philadelphia, PA)
If you are trying to save money, you can travel to Philadelphia for only $1.85, a significant savings over Amtrak.
Trenton's Amtrak Station is conveniently located downtown.
Here you can catch regular Amtrak lines, New Jersey Transit and SEPTA (philly) transit lines....