Avelo Airlines is a fundamentally strange airline. This low-cost carrier is a major player in many US travel markets, but it tends to avoid the biggest cities. Many passengers have likely not even heard of this unique carrier, despite it having existed in some form for decades. Unlike an airline like Breeze Airways, which has the backing of legendary industry titan David Neeleman and a very specific hub-busting operating model, Avelo Airlines can be confusing to understand and classify.