| Nonstop Flights: Austin to/from Cancun $210-$235 r/t â Spirit Spirit has round-trip flights from Austin (AUS) to Cancun (CUN) for $210-$235, NONSTOP. Flights February, March, April, May, and August. Very few weekends available. You can also save an additional 16% off your Hotel or up to $150 for Flight+Hotel packages on CheapTickets by using the âGLOBETROTTERâ or âADVENTURE150â coupon codes at checkout (before finalizing your booking). Note: Spirit fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding. Note: Spirit seats only have 28-inches of pitch; 2-to-3 inches less space than most other airlines. 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 Nonstop Flights: Austin to/from Cancun $210-$235 r/t â Spirit . | 