How do you get from Grand Central Station to Ground Zero by subway?

Answer 1

You can't; there is no subway service to LaGuardia. The only public transportation to LaGuardia is the M60 bus.

The M60 bus runs through Upper Manhattan only (via 106th and 125th Streets) so you'll have to take the subway. The simplest way to get to the M60 from Grand Central is to take the Uptown 4or 5 express trains (of the 4-5-6, the dark green line), 3 stops, from 42nd Street-Grand Central to 125th Street (at Lexington Avenue).

Then get the M60 bus at its 125th and Lexington stop.

Note that the M60 bus does not operate between 1 and 5 am.

See the Related Link below for more information about the M60 bus.

Answer 2

The simplest way would be to take the Downtown 4 or 5 express trains (of the 4-5-6, the dark green line), 2 stops, from 42nd Street-Grand Central to Brooklyn Bridge-City Hall.

Depending on which exit you use, you may exit the subway at the corner of Chambers and Centre Streets (at the northeast corner of City Hall Park), or you may exit at the next block up, at the corner of Reade and Centre Streets.

Walk 3 blocks west on Chambers Street (in the same direction as traffic) to Church Street.

Turn left onto Church Street, and walk 4 blocks south on Church Street (in the opposite direction of traffic) to Barclay Street.

The WTC complex is bordered by Church Street to the east, Barclay Street to the north, West Street to the west, and Liberty Street to the south.