Delta can get you to Pisa this winter for as little as $538 roundtrip (including taxes and fees). Travel between: October 31, 2007 and January 13, 2008. Deadline for booking: September 25, 11:59 PM ET. Other requirements: Outbound travel Monday through Thursday through December 13, 2007. Fares require a Saturday-night stay, and the maximum stay is one month or until January 13, 2008, whichever comes first.
Smartertravel.com has the 411 on Eurofly’s best fall and winter fares. According to the site, “Fares start at $399 round-trip, and destinations include Rome, Bologna, and Naples. The cheapest Rome fares are valid from November 1 through December 15, and again from December 25, 2007, through March 13, 2008. The cheapest fares for the other destinations are valid from November 1 through 18, 2007. Eurofly hasn’t listed a booking deadline.”