Originally Posted by
vgrund
All I have ever done is take the Airtrain. It is fast, efficient and free. It runs every few minutes.
The airtrain doesn't exist at LGA (yet)

Originally Posted by
tommybo
I have a 40 minute lay over....what is fastest way and can i make this?
I'm assuming you are talking about the A and C gates in Term B? Who are you flying into A gates? There's an airside transfer bus by AA but i'm not sure if you can use them if not flying on AA.