If you would like to have a non-stop flight, expect that it will take you about 7 hours. It would depend on the airline that you choose. There are some that will take longer depending on the flight speed and the weather conditions. There are some flights that will take as long as 22 hours because of the many stop-overs that the plane has to go through.
The flight itself may not take too long but the waiting time will always make a huge difference on how long the flight would take. Some people dread this flight because they know that they are only going to travel within the country but the flight time is just too long. Take note that shorter flights may cause more money.
The plane flew faster to California than it flew to NY.
The distance is the same for both flights. We have no information regarding tha passengers, so we must conclude that the speed of the plane was the variable.