Which airline flies the most flights to AUS? The top airline carrier flying out of Austin Bergstrom Intl. is Southwest Airlines and they fly over 1,835 flights every month.
- United - Austin (AUS) to Madrid (MAD) on 11/21 leaving at 10:18 am and returning on 11/24 at 10:29 pm for only $1,346 per person.*
*Prices vary and will be updated when you view current flight availability results. Deals displayed here are based on flight pricing and availability as of 11/16/2017 and may change as you get closer to the actual flight date. Deals displayed whose dates are in the past are no longer valid.