| Cheap Flights: Austin to/from Montreal $187-$198 r/t â United United has round-trip flights from Austin (AUS) to Montreal (YUL) for $187-$198 with a connection. Flights in March, November, and December. Very few extended weekends available. Origin/Destination reversible. You can also save an additional 16% off your Hotel or up to $150 for Flight+Hotel packages on CheapTickets by using the âWANDERLUSTâ or âADVENTURE150â coupon codes at checkout (before finalizing your booking). Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. We donât charge a subscription fee. All of our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for our content, you are being ripped off. Read More Cheap Flights: Austin to/from Montreal $187-$198 r/t â United . | 