By plane
Princeton has an eponymous airport located in Montgomery, less than 2 miles from Nassau Street and Princeton University. Princeton Airport serves mostly general aviation i.e. hobby flying, but it also sees its fair share of business charter flights. It has one runway, fuel stations, lots of aircraft tie-down space, and hangars. This makes the airport a very cost-effective solution for travelers who pilot their own airplanes. Car-rental service is located on-site.
Other nearby airports include the Somerset Airport, Central Jersey Regional Airport, and Teterboro airport. These airports, like Princeton, do not operate commercial flights, but anyone with his/her own airplane can fly in.
The larger Trenton Mercer aiport offers some air-taxi options.
Newark Liberty International Airport
IATA: EWR, ICAO: KEWR, FAA LID:EWR is in Newark in New Jersey and is about 1 hour away by car. New Jersey Transit trains stop at EWR, so it's possible to reach Princeton from EWR without a car or taxi.Philadelphia International Airport
IATA: PHL, ICAO: KPHL, FAA LID:PHL (http://www.phl.org/index.html) is the largest airport in the Delaware Valley region and in Pennsylvania. It is about 1.5 hours away by car
By car
Two major highways- Route 206 and Route 27, pass through Princeton. U.S. Route 1, runs just east of the town while Interstate 95 and the New Jersey Turnpike are two alternative routes to get into the area.
The town's main street is Nassau Street, on which the majority of shops and eateries can be found. Although Princeton has parallel parking spaces along the main roads, most are metered and all are checked frequently by the infamously vigilant local parking patrol. The Princeton Parking Cash Card, available from machines in Spring Street Garage, conveniently pays for parking at all meters and allows for the reclamation of unused "time" upon return to the meter; "max out" the meter then take back unused credit upon return to forfend the award of parking tickets in the forty dollar range. There are multiple parking garages; the municipal garage on Spring Street, a few dozen feet from the Princeton Record Exchange, is the most affordable, but the pricier garages in Palmer Square and on Chambers Street are convenient to many locations as well. Infrequent visitors must note with dismay that Sunday parking on the street is no longer free.
By bus
COACH USA under the name Suburban offers bus service from New York and New Brunswick to Princeton.
New Jersey Transit operates several commuter bus lines connecting Princeton with other areas. Several bus stops are located throughout Princeton Borough and Township. Buses generally leave on every half-hour between 8.30 am and 9 pm weekdays, and irregularly before and after those hours. The Saturday schedule is similar, and the Sunday schedule is hourly.