> New York City's subway system doesn't attempt to cross over into Jersey or even to the eastern half of Queens.
There are other systems that do, though: PATH (for points immediately across the Hudson), NJTransit (commuter rail to a lot of NJ), LIRR (commuter rail to Long Island & Queens) and MetroNorth (commuter rail to points north in NY and CT).
Given how long it takes to ride the subway to the farther reaches of Queens (e.g., Jamaica), I can't imagine how long it would take to commute to Manhattan via subway from, say, Bayside Queens (which is served by LIRR).
There are other systems that do, though: PATH (for points immediately across the Hudson), NJTransit (commuter rail to a lot of NJ), LIRR (commuter rail to Long Island & Queens) and MetroNorth (commuter rail to points north in NY and CT).
Given how long it takes to ride the subway to the farther reaches of Queens (e.g., Jamaica), I can't imagine how long it would take to commute to Manhattan via subway from, say, Bayside Queens (which is served by LIRR).