Originally Posted by
RogerD408
Actually, Amtrak DOES NOT serve JFK (verified at Amtrak.com). You take the Air Train from JFK to Jamaica station and then either the LIRR or subway to Penn Station. LIRR is quickest (schedule permitting), subway is cheapest.
LIRR also offers the benefit of a very quick transfer at NYP with escalators every step of the way (makes dealing with luggage much easier). Taking the subway involves a little bit more walking (on both ends), and hauling luggage up and down the stairs and through the turnstiles is a bit more of a hassle.
Personally, I'd do LIRR-NYP-Amtrak, and I'd be fine with the earlier train (an international flight like that shouldn't be delayed enough for you to miss the first train).