4-star Porter Airlines further cut prices on already discounted Canada and U.S. fares, resulting in the lowest fares we've seen in the market for travel through winter.

Book by Friday to get these deals on travel through March 27. (Christmas and New Year's weeks are not available at these prices.)

Sample each-way fares from Toronto (including tax):

• Ottawa ... $117 outbound / $106 return ($222 roundtrip)
• Windsor ... $123 outbound / $106 return ($227 roundtrip)
• Quebec City  ... $135 outbound / $130 return ($264 roundtrip)
• Washington-Dulles: $155 outbound / $99 return ($253 roundtrip)
• Montreal ... $113-$166 outbound / $119-$172 return ($230-$336 roundtrip) 
• New York-Newark ... $160 outbound / $104 return ($263 roundtrip)
• Boston ... $165 outbound / $109 return ($274 roundtrip)
• Mont-Tremblant ... (service starts Dec. 7) $180 outbound / $141 return ($320 roundtrip)
• Chicago-Midway ... $176 outbound / $120 return ($295 roundtrip)
• Halifax ... $197 outbound / $198 return ($383 roundtrip)

Sample each-way fares from Montreal (including tax):

• Toronto (nonstop) ... $120 outbound / $114 return ($233 roundtrip)
• Halifax ... $178 outbound / $172 return ($348 roundtrip)
• Thunder Bay ... $182 outbound / $154 return ($334 roundtrip)
• Sudbury ... $182 outbound / $154 return ($334 roundtrip)
• New York-Newark ... $202 outbound / $150 return ($351 roundtrip)
• Washington-Dulles ... $207 outbound / $155 return ($361 roundtrip
• Boston ... $218 outbound / $166 return ($382 roundtrip)
• Chicago-Midway ... $233 outbound / $182 return ($414 roundtrip)

Sample each-way fares from Ottawa (including tax):

• Toronto ... $106 outbound / $117 return ($222 roundtrip)
• Moncton ... $152 ($303 roundtrip)
• Halifax ... $169 ($337 roundtrip)
• Thunder Bay ... $174 outbound / $151 return ($323 roundtrip)
• Windsor ... $185 outbound / $179 return ($363 roundtrip)
• Washington-Dulles ... $196 outbound / $150 return ($344 roundtrip)
• New York-Newark ... $196 outbound / $150 return ($344 roundtrip)
• Quebec City  ... $223 outbound / $229 return ($451 roundtrip)
• Boston ... $227 outbound / $182 return ($407 roundtrip)
• Chicago-Midway ... $259 outbound / $213 return ($470 roundtrip)

Sample each-way fares from Halifax (including tax):

• St. John's ... $114 ($228 roundtrip)
• Ottawa ... $172 ($344 roundtrip)
• Montreal ... $172 outbound / $178 return ($349 roundtrip)
• Toronto (one stop) ... $201 outbound / $212 return ($412 roundtrip)

Note: We found the lowest fares on Tuesdays-Thursdays and Saturdays. When searching roundtrip fares, the outbound flight is often priced higher than the return flight. However, the total roundtrip price will be less than the cost of two one-way fares.

About the airline: Porter Airlines cracked Conde Nast Traveler's Readers Choice Top 30 Airlines list and placed second worldwide in the Small Airlines category in the most recent survey. The airline also boasts an official 4-star rating from Skytrax, custom leather upholstery and more legroom than any cabin in its class. In-flight service includes free snacks, soft drinks, wine and beer.