5:15 layover in JFK this week, any suggestions?

[spikedjack]

I'm flying to JFK then onwards to Chicago next week but have to suffer a 5:15 layover in JFK around midday.

Was thinking of getting the air train and bus etc to the green acres mall, but given its about an hours trip each way, i'm guessing i'll only have an hour or so in there before needing to return to check in for my domestic onward flight.

Any suggestions?

Landing into T4 then out of T5

Cheers