airlines
n. countable A2 Elementary US //ˈɛɹˌɫaɪnz// UK //ˈeəlaɪnz// air·lines
n. companies that provide regular travel services by plane for passengers or goods.
n. commercial organizations providing scheduled air transport services for passengers and freight.
Many airlines offer cheaper tickets if you book months in advance.
Major international airlines have increased their safety protocols following the recent global health crisis.
The deregulation of the industry led to a surge in low-cost airlines, fundamentally altering the economic landscape of short-haul travel across the continent.
Usage
Commonly used in the plural to refer to the industry as a whole or a group of companies.