Rental car company rates vary. There's no one company that is always the most affordable, expecially for a one-way rental.
I would suggest going to a general travel booking site and letting it do a rate comparison for your exact dates. Kayak.com would be a good starting place.
Unless you are transporting lots of stuff, also consider taking a bus or Amtrak.
My son is showing his daughter colleges. He's flying from LA to meet her in Boston (she'll be in the Chestnut Hill area), then wants to drive through New Haven, CT and also visit Princeton, NJ before he returns the car anywhere in the NYCity area. We are not familiar with either area, so any advise will be appreciated. Thanks.
Many companies will charge you a one way rate so it is best if you use something like Kayak and compare many because you may find one that is charging less or nothing. Do your homework.
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