Another option: From Newark's Penn Station, hop a PATH train to 33rd Street, with a transfer at the Journal Square stop. Cost is $1.50. Info: 800-234-7284, www.panynj.com/path.
BUS: Greyhound and Peter Pan have daily service. Buses run from the D.C. terminal (1005 First St. NE) to New York's Port Authority (Eighth Avenue and 41st Street). Fares start at $20 one way, $35 round trip. Info: 800-231-2222, www.greyhound.com.
Other companies that provide service between the cities include Vamoose Bus (877-393-2828, www.vamoosebus.com;$25 one way/$40 round trip) and Washington Deluxe (866-287-6932, www.washny.com,$20 one way/$35 round trip). Those companies, as well as Eastern, Todays Bus and Dragon (which each charge $20 one way/$35 round trip), can be booked at www.ivymedia.com.
TRAIN: Amtrak's Acela Express goes from D.C.'s Union Station to New York's Penn Station in 2 hours 45 minutes; one-way fares are $157 for business class. The three-hour trip on the Metroliner starts at $128 one way. Fares for regional service (about 3 1/2 hours) start at $76 one way; reservations required. Info: 800-872-7245, www.amtrak.com.
CAR: It takes about 4 1/2 hours to drive the 238 miles from the Beltway to NYC. Consider parking in New Jersey and taking a New Jersey Transit or PATH train or a ferry into town.
* Trains from Hoboken, N.J. Light rail PATH trains operate daily from Hoboken -- the last exit in Jersey before the Lincoln Tunnel -- to several stops in Manhattan for $1.50 each way; commute time to West 33rd Street is 14 minutes. Paid parking available nearby. Info: 800-234-7284, www.panynj.gov/path.
* Trains from Metropark. The Metropark station is convenient to the New Jersey Turnpike and offers parking for $5 daily. New Jersey Transit trains along the Northeast Corridor line go directly into Manhattan; the train to Penn Station costs $6.70 one way, $10.25 round trip. Amtrak also stops at Metropark en route to Manhattan; from $27 one way.
* Trains from other New Jersey locales. Parking and train service are available at 10 other stops on the Northeast Corridor line, including Trenton, New Brunswick and Elizabeth. Info: 800-626-7433, www.njtransit.com.
* Ferries from New Jersey ports. NY Waterway operates ferries from Hoboken and Weehawken to numerous points in Manhattan. Fares start at $3.50 each way. Limited metered parking and private lots are available in Hoboken; at Weekhawken's Port Imperial parking lot, rates are $7 to $8 daily. Free shuttle buses connect to points in Manhattan. Info: 800-53-3779, www.nywaterway.com.
FOR MORE INFO: Port Authority of New York and New Jersey, 212-435-7000, www.panynj.gov.
-- Elissa Leibowitz Poma and Anne McDonough