Book by 11:59 pm Eastern Time February 24, 2014. Travel by June 27, 2014. Fares may not be available April 18-21, May 16-19, and May 23-26, 2014. Discount applies only to the regular base fare and does not apply to fees, taxes or surcharges. Lowest fares are available on Tuesday and Wednesday departures. Fares are subject to availability and may not be available through the entire travel period. Full fare breakdown available for all itineraries on flyporter.com. Fares quoted are one-way outbound in Firm Class. Inbound fares may differ. New bookings only. Fares include all applicable government-imposed taxes and mandatory fees, which may amount to as much as $150 one-way per passenger, depending on routing. Foreign taxes will fluctuate based on the prevailing exchange rate. Fees for optional services, such as itinerary changes, additional baggage, advance seat selection, or certain special service requests, may increase overall cost. Fares are non-refundable but itineraries may be changed for a fee of up to $200 per person per direction, plus any fare differential. Other significant conditions (including a $25 first-checked bag and $35 second-checked bag fee to and from the U.S., a $20 second-checked bag fee for flights in Canada, and charges for overweight and/or excess baggage) may change without notice and are not guaranteed until ticketed. Visit flyporter.com for more information. In case of any discrepancy between advertised fares and the fares shown on the website at the time of booking, the latter shall prevail. Advance purchase is required: Boston-Toronto: 21 day; Boston-Ottawa: 21 day; Boston-Montreal: 21 day; Boston-Thunder Bay: 21 day; Boston-Quebec City: 21 day; Boston-Sudbury: 21 day; Boston-Timmins: 21 day; Boston-Sault Ste Marie: 21 day; Boston-Windsor: 21 day; Boston-Mont Tremblant: 21 day. Chicago-Toronto: 21 day; Chicago-Ottawa: 21 day; Chicago-Montreal: 21 day; Chicago-Thunder Bay: 21 day; Chicago-Quebec City: 21 day; Chicago-Sudbury: 21 day; Chicago-Timmins: 21 day; Chicago-Sault Ste Marie: 21 day; Chicago-Windsor: 21 day; Chicago-Mont Tremblant: 21 day. Newark-Toronto: 21 day; Newark-Ottawa: 21 day; Newark-Montreal: 21 day; Newark-Thunder Bay: 21 day; Newark-Quebec City: 21 day; Newark-Sudbury: 21 day; Newark-Timmins: 21 day; Newark-Sault Ste Marie: 21 day; Newark-Windsor: 21 day; Newark-Mont Tremblant: 21 day. Dulles-Toronto: 21 day; Dulles-Ottawa: 21 day; Dulles-Montreal: 21 day; Dulles-Thunder Bay: 21 day; Dulles-Quebec City: 21 day; Dulles-Sudbury: 21 day; Dulles-Timmins: 21 day; Dulles-Sault Ste Marie: 21 day; Dulles-Windsor: 21 day; Dulles-Mont Tremblant: 21 day.