Update: Some offers mentioned below are no longer available. View the current offers here.Want to see the latest flight deals as soon as they’re published? Follow The Points Guy on Facebook and Twitter, and subscribe to text message alerts from our deals feed, @tpg_alerts.Airfare deals are typically only available on limited dates. We recommend you use Google Flights to find dates to fly, then book through an online travel agency such as Orbitz or Expedia, which allows you to cancel flights without penalty by 11pm Eastern Time within one day of booking. However, if you’re using The Platinum Card® from American Express, you’ll need to book directly with the airline or through the Amex Travel portal to get 5x MR points. Remember: Fares may disappear quickly, so book right away and take advantage of Orbitz or Expedia’s courtesy cancellation if you’re unable to get the time away from work or family.Many of Canada’s most popular destinations are beautiful in the fall, and if you book now, it won’t cost you as much to get there. Air Canada, Delta and WestJet are currently offering discounted flights from many US cities, including Los Angeles (LAX), Denver (DEN) and Phoenix (PHX), to Calgary (YYC) and Vancouver (YVR) from just $145 round-trip. Air Canada and Delta’s discounted fares are for their basic economy products. While both fare types include carry-on bags, you won’t earn miles with an Air Canada basic economy ticket.Finding these bargains is easy. Just head to Google Flights and plug in your desired departure city. After finding dates that work best for you, book with the airline directly or with an OTA such as Expedia or Priceline.Airline: Air Canada, Delta, WestJetRoutes: ATL/DEN/IAH/LAS/LAX/PHX/SAN/SEA/SFO/SJC/SMF to YVR/YYCCost: $145+ round-trip in economyDates: August – December 2018Booking Link: Orbitz, Expedia or directly with the airlinePay With: The Platinum Card® from American Express (5x on airfare), Chase Sapphire Reserve, Citi Prestige (5x on airfare plus excellent trip delay insurance) or Chase Sapphire Preferred Card (2x on travel)Here are a few examples of what you can book:Las Vegas (LAS) to Calgary (YYC) in August for $145 round-trip on Air Canada via Expedia:Phoenix (PHX) to Vancouver (YVR) in September for $208 round-trip on Delta via Expedia:Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Denver (DEN) to Calgary (YYC) in September for $215 round-trip on WestJet via Expedia:San Francisco (SFO) to Calgary (YYC) in October for $218 round-trip on Delta/WestJet via Expedia:Los Angeles (LAX) to Vancouver (YVR) in December for $222 round-trip on WestJet via Expedia:Maximize Your PurchaseDon’t forget to use a credit card that earns additional points on airfare purchases, such as The Platinum Card® from American Express (5x on flights booked directly with airlines or American Express Travel), Chase Sapphire Reserve, or Citi Prestige (5x on airfare) or the Chase Sapphire Preferred Card (2x on all travel purchases). Check out this post for more on maximizing airfare purchases.H/T: Scott’s Cheap FlightsFeatured image by Photography by Harry Traeger / Getty Images.