They share a common border, so the mileage is 0.
Approx. 530 miles.
the operation of a competing steamboat service between New York and New Jersey
It is 397.00 miles according to MapQuest.
nothing. they border each other.
It is 32.78 Miles according to MapQuest.
About 232 miles on I-84
New York is a big state. The approx straightline mileage from Louisville, KY and New York, NY is 650 miles. ref: http://www.indo.com/distance/
From New York City, New York to Portland, Maine is about 320 miles.
Zero.
New Jersey and New York share a common border, so the drive between them would not exist.
About 451 miles by road
It is 56.93 miles according to MapQuest.