As one airline offers wintertime sales, the others tend to follow suit pretty quickly – so we’re seeing a bunch of new fare sales coming out one on top of the other right now. Here are some of the Europe round-trip ticket deals that Delta Air Lines is offering for winter travel from New York City:

• to Madrid from $438
• to Shannon from $498
• to Amsterdam from $518
• to Rome from $538
• to Athens from $618

With this deal, travel must be between December 24, 2008 and April 2, 2009 and you’ve got to book your trip by December 22. There’s a Saturday night stay required, and the longest you can stay is 30 days. Each destination has different blackout dates associated with it, so be sure to read the complete rules before you book.