From the North
Take Interstate 95 South to the Baltimore Beltway (695 West). From the Baltimore Beltway, take Interstate 83 South. Take the St. Paul Street exit off of Route 83 in downtown Baltimore. Approximately ten blocks South on St. Paul Street you will cross Mt. Vernon Place (there will be a park and a tall monument to your right) and turn right into the Peabody Garage. There is a fee for parking in the garage.
From the Airport
When you arrive at the Baltimore/Washington International Airport, check with the ground transportation desk in the baggage area by belts number three and four. There is a "Super Shuttle" service that leaves at half-hour intervals. It will drop you at the Mt. Vernon HOTEL, approximately three blocks south of Peabody.
From the Mt. Vernon HOTEL (facing the street) turn left and walk one half block to Charles Street. Go left on Charles, walk two blocks and enter the school at Peabody Mews-- half way up the hill to the monument. Total travel time, including the walk, is one hour. You must arrange for a pick up by the Super Shuttle to get back to the airport. The phone number is (410)724-0009. Of course, you can also take a taxi cab which will drop you off at the door. The cost is roughly double that of the shuttle.
Follow this link to a general Peabody map.
Follow this link to a Peabody in Mt. Vernon (Baltimore) map.