St. John's Prep is located in Astoria...
One of the borough’s well-known neighborhoods in western Queens. Astoria is a family-oriented community in a quiet residential neighborhood. It is accessible from all of Queens County and most sections of Brooklyn, Manhattan, and the Bronx.
By Public Transportation:
From NYC, Upper Manhattan, and The Bronx:
Connect to N or Q train to Ditmars Blvd. (last stop).
The N or Q train stops five blocks from St. John's Prep and the Q69 bus stops at the corner.
Walk away from the elevated tracks to Ditmars Blvd.
Make a left on Ditmars Blvd. Walk 5 blocks to Crescent Street. (between 26th and 24th Streets)
Make a right turn on Crescent Steet to the main entrance of the school.
Hopstop.com can be helpful for planning your trip.
From the Grand Central Parkway: Take the 31st Street exit (last exit before the RFK Bridge, formerly Triboro Bridge).
Bear right on Hoyt Avenue to 21st Street. Make a right onto 21st Street to 21st Avenue. Make another right onto 21st Avenue to Crescent Street. Take Crescent Street to the main entrance located at 21-21 Crescent Street.
From the Brooklyn Queens Expressway; Astoria Blvd West exit:
Immediately bear right onto 43rd Street. Take 43rd Street to 21st Avenue and make a left onto 21st Avenue. Take 21st Avenue to Crescent Street and make a left onto Crescent Street. Take Crescent Street to the main entrance located at 21-21 Crescent Street.
Additional information is available on the MTA website: MTA Information