From Newark Liberty International Airport (EWR):

Take AirTrain to Newark Liberty International Airport Train Station. At Airport Train Station, take a NJ Transit train on the North Jersey Coast Line or Northeast Corridor Line to Newark Penn Station or the North Jersey Coast Line to Hoboken. (link to: http://www.njtransit.com/sf_tr_schedules.shtml)

At Newark Penn Station, transfer to PATH train going to WTC. At Hoboken, you may use either the PATH train or the Hudson-Bergen Light Rail train to Harborside Financial Center.

If using PATH to WTC: Get off at Exchange Place Station. (Link to: http://www.panynj.gov/) Exit using the main escalator. After exiting, turn right, and walk in the direction of Hyatt Hotel, the boardwalk is adjacent to the hotel, take a short 10 minute walk along the boardwalk in the direction of the tall glass building, this is Plaza Ten. The building’s entrance will be directly in front of you once you cross the street.

If using Hudson-Bergen Light Rail: Take either the 22nd St, the Bayonne Flyer or the Liberty State Park train and get off at Harborside Financial Center. (link to: http://www.njtransit.com/sf_lr.shtml) Once you exit the train, cross the street on the side the train is departing, make a left and walk toward the corner, turn right at the corner, Plaza Ten is on left directly on the water.

From New York LaGuardia Airport (LGA):

Q33 and Q47 buses go to Roosevelt Avenue/74th Street where you can transfer to the New York Subway (http://www.mta.nyc.ny.us/nyct/maps/submap.htm). Take the E train (downtown) to World Trade Center in Manhattan.
From the WTC station, take the PATH train to Jersey City (http://www.panynj.gov/). Get off at the Exchange Place stop which is the first stop on PATH. Exit using the main escalator. Get off at Exchange Place. Exit the station using the main escalator. After exiting, turn right, and walk in the direction of the Hyatt Hotel, the boardwalk is adjacent to the hotel, take a short 10 minute walk along the boardwalk in the direction of the tall glass building, this is Plaza Ten. The building’s entrance will be directly in front of you once you cross the street.

From New York John F. Kennedy International Airport (JFK):

Take AirTrain to Jamaica Station. At Jamaica Station, take the E subway to World Trade Center in Manhattan. From the WTC station, take the PATH train (http://www.panynj.gov/) to Jersey City.
Get off at the Exchange Place stop which is the first stop on PATH. Exit using the main escalator. After exiting, turn right, and walk in the direction of the Hyatt Hotel, the boardwalk is adjacent to the hotel, take a short 10 minute walk along the boardwalk in the direction of the tall glass building, this is Plaza Ten. The building’s entrance will be directly in front of you once you cross the street.