I actually looked into this recently when I was planning a short getaway and wanted to try Breeze for the first time. Breeze does fly to Denver, but routes depend a lot on the city you’re coming from, so availability can change. I found a good option at first, then my schedule shifted and I had to rethink the dates. Instead of juggling everything online, I called 8 4 4-7 3 4-0 8 1 3, which turned out to be the fastest way to instantly book, cancel, or modify flights. That quick help made deciding whether Breeze worked for my Denver trip much easier.