New Haven, CT to JFK Airport

I have an international flight at 11pm on a Friday night and I have to leave New Haven no sooner than 8pm. I'm planning on taking a rental car since that seems like the fastest and most direct route at 1 hour 30 minutes with no traffic.

How is traffic to JFK on a Friday night after 8pm? I'm hoping to get there at least an hour before flight since I'm not checking baggage.

Thank you for any insights you may have. ^