Originally Posted by
CPH-Flyer
Your boarding pass allows you access to any terminal in JFK, as far as I know. The disadvantage is that the terminals are not connected airside, so you'd need to pass a TSA check point twice. JFK is not famous for the selection of Star Alliance lounges, the Lufthansa lounges get a lot of flak, Turkish seem to have lounge as well and then Air India, but I have heard nothing about the last two.
Opening hours in relation to the NH flight can also be an issue
In my experience, Terminal 1 is the lone exception for trying to gain access when flying from a different terminal.
I’ve tried several times to get into 1 with no luck. The Senator Lounge was ok, but the shower wasn’t the best. While small, I found the Turkish to be fine, although a bit crowded when I was there. Air India is quite small, often crowded and not worth traveling from a different terminal in my opinion.