In today's Washington Post Travel Section, there was a notice that- Porter Airlines has sale fares from Washington Dulles to cities throughout eastern Canada. Actually, the fare sale extends from other cities in the eastern U.S, including Boston, Burlington, Chicago, Myrtle Beach and Newark. For example, the round-trip fare from Dulles to Toronto is $182, including taxes; fare on other airlines starts at $345. Travel Tuesdays and Wednesdays through June 27 for the lowest fares; some holiday blackout dates apply. Twenty-one-day advance purchase required. Book by Feb. 24 at: www.flyporter.com.