Hi Claire,
The majority of people fly from London, so below are the provisional flight times from Heathrow.
On 16th September, you will depart Heathrow Airport at 09:05hrs and arrive at JFK Airport at 11:40hrs. On your return journey, you will depart JFK Airport at 18:30hrs and arrive back at Heathrow Airport at 06:45hrs.
We offer flights from Glasgow, Edinburgh and Manchester for this trip too. If you would prefer one of these flights, let me know and I will be happy to share the provisional times.
Kindest regards,
Monty