Avianca is unconcerned about fluctuations in its unit revenues, but the company believes its cost base serves as the foundation for continued profitability.

Steep costs, capacity swings and Boeing woes compounded an already seasonally challenging quarter for U.S. airlines.

Southwest's expected deliveries of Boeing 737-8s in 2024 have plummeted by 59 aircraft as it faces cost pressure from higher labor and maintenance expenses.