When you book a return ticket, it's best to include a Saturdaynight in New York, because otherwise you pay almost double the fare. When booked in december 2009, a flight in may 2010 will cost you 473 euro return if you include a Sturday night stay in New York. If you don't, the same return will cost you 973 euro.

Booking a one-way ticket seems sometimes extremely expensive. Booking in december 2009 for that same non-stop flight to New York which you can book return for 473 euro, will cost you 2,250 euro.