Airports
There are three airports surrounding New York City: JFK, LaGuardia (LGA), and Newark (EWR).
Depending on your travel variables (time, day of week, airline, etc.), it may be cheaper to fly into one more than the others.
However, transportation from each of them has it's own set of perks, so we've broken it down for your consideration below.
Legend (left to right):
Green = Newark Airport (in NJ); Light Blue = Penn Station; Purple = Grand Central; Orange Diamond = Wedding Venue;
Yellow Star = Our Apt (in Brooklyn), Red = LaGuardia Airport (Queens); Blue = JFK Airport (Queens)
jfk
Pros: Easiest public transportation in my opinion (AirTran, then subway or LIRR).
Cons: A farther taxi fare to us than LGA.
Taxi to our Apt (the yellow star): ~$50-60
(Taxi to NYC will be more)
laguardia
Pros: The closest airport to our apartment
Cons: If you're planning on taking public transportation, it's going to be by bus, then subway - so it's a little tough if you're hindered by luggage.
Taxi to our Apt (the yellow star): ~$25-35
(Taxi to NYC might be more, depending on destination)
NEWARK
Pros: Can be cheaper to fly into.
Cons: The most transfers needed when taking public transportation. If you're familiar with NYC, it can be a smooth trek, but otherwise we wouldn't really recommend it.
Taxi to our Apt (the yellow star): ~$100+
(Taxi to NYC will probably be less)
Trains
There are 2 main train stations in New York: Grand Central Terminal, and Penn Station
Depending on where you're coming from and what train line you take will likely determine which train station you'll end up at.
LEGEND (LEFT TO RIGHT):
Green = Newark Airport (in NJ); Light Blue = Penn Station; Purple = Grand Central; Orange Diamond = Wedding Venue;
Yellow Star = Our Apt (in Brooklyn), Red = LaGuardia Airport (Queens); Blue = JFK Airport (Queens)
PENN STATION
Trains: Amtrak, NJ Transit, Long Island Rail Road (LIRR)
Subway Lines: 1, 2, 3 & A, C, E
grand central station
Trains: Metro North
Subway Lines: 4, 5, 6, 7 & Shuttle to Times Square