Terminal 4

The AirTrain runs between 5-10 mins. It takes no more than 3 mins to arrive to the next immediate terminal but you must consider the walk from the AirTrain to the check-in counters or to the security screening area. So if you are connecting to another flight I would be a bit more concerned about the security line than the AirTrain. In addition you can not walk from terminal 4 to terminal 7.

Nothing will be opened at this time.The first location with chairs you find after you get your lugagge,sit down and relax. Stay inside the airport,there is nothing outside.Good luck.

To get from T4 to T5 you would take the Airtrain, which is free and circles the entire airport. Once you come through customs and are at the arrival area, you will see signs for the Airtrain that you can't miss. The Airtrain travels in both directions, just be sure to travel in the direction to T5, otherwise you will have a tour of the entire airport! It generally takes about 15 minutes for a full circle of JFK. Once on the Airtrain, actual travel between neighboring terminals is only about 5 minutes, but you have to wait for it, and the number of passengers means you may have to wait for the next car to arrive.

It generally takes about 1 1/2 to 2 hours from the time you airplane hits the ground to the time you are at arrivals, but this greatly depends on such factors as weather and whether you are traveling at peak times. It also greatly depends upon which line through customs you use (i.e. US Citizens move far quicker than foreigners). If you are a foreign national, I would give yourself at least 3 hours for your connection flight. But if you are a citizen, you should have enough time with your current schedule, but if not, give yourself more time to be safe.

There are tours available in NYC, but two things you need to consider. First, to get to Manhattan from JFK, you need at least 45 minutes to an hour travel time, and it is $50.00 one way (plus tolls). The traffic to JFK and from JFK is usually ridiculously busy, and your best bet is to take public transportation from Jamaica station. But if you do not know the NYC transport system, then I think you should avoid that idea as it can be quite complicated. Another consideration is what are you going to do with your luggage while you are touring around? If you are on a connection flight, the airline may hold it for you, but overseas arrivals have to check their luggage through customs and then drop it for the connecting flight. If your airline is not checking your bags through, then you have a problem because the domestic flight may not let you check in so many hours in advance. You can ask the skycaps if they have some means of holding your luggage for you if you pay a fee, but again you are taking your chances. The bottom line is 10 hours seems like a very long time, but with all the complications, and presuming your primary concern is completing your travel without incident, your best bet is to enjoy what the airport has to offer, and buy yourself a day pass at one of the many airlines executive clubs (US Airways for example, has a $50 day pass) to while away the hours you are waiting.