If your trip is more about the destination than the voyage, there are some pretty good deals available at Travelocity. You have to book by December 12, travel by April 4, 21-day advance purchase, and travel only on Tuesday, Wednesday, or Saturday; but the round-trip fares to popular (for some definition of popular) destinations are down around $200. Y’know, for when you know 21 days in advance that you’re really going to want a Saturday-Tuesday break.