Which airline flies the most flights to STL? The top airline carrier flying out of Lambert St. Louis Intl. is Southwest Airlines and they fly over 2,264 flights every month.
- Delta - St. Louis (STL) to Atlanta (ATL) on 6/12 leaving at 5:10 am and returning on 6/14 at 1:16 pm for only $176 per person.*
- United - St. Louis (STL) to Denver (DEN) on 5/29 leaving at 3:30 am and returning on 5/31 at 1:40 pm for only $213 per person.*
- Delta - St. Louis (STL) to Tampa (TPA) on 5/30 leaving at 5:05 pm and returning on 5/31 at 6:49 am for only $218 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 05/19/2018 and may change as you get closer to the actual flight date. Deals displayed whose dates are in the past are no longer valid.