Yes, you can see that in some cases when the flight prices are affected by cookies, and this is common for the price of a flight to move up and down quickly, and you need to focus on the prices that shown by the provider of travel and also spot the behaviors that are unfair.
Due to this cookies effect, you have to take speed or direct action to book the flights to new york at a lower price; if you see the price of the flight is higher than usual, then you can wait and then book the flight ticket. There are multiple different prices that you will get and when the flight prices low, then directly book the ticket.