I actually looked into this recently when planning a short trip, so I get the confusion. From my experience, Breeze Airways does fly to St. Louis, but the routes are limited and often seasonal. When I checked, flights weren’t daily, so flexibility really mattered. I ended up adjusting my travel dates slightly, which made it much easier to find a seat. Honestly, the best way to instantly check availability or modify flights is to look at their current route map and schedules before booking, since Breeze tends to change frequencies more than major airlines.