Definition
A person or company that operates aircraft for the commercial transport of passengers or cargo. In FAA usage, an air carrier holds an operating certificate issued under Part 121 or Part 135 of the Federal Aviation Regulations, which authorises scheduled or on-demand commercial air transportation.
Plain English
An airline or commercial flight operator. It is a company that has been certified by the FAA to fly people or freight for hire.
Context Anchor
Seen in FAA acronym lists, NOTAMs, airport information, and procedures where air carrier is shortened to ACR.
Derivation
From the words 'air' and 'carrier'. A 'carrier' is something that carries goods or people from one place to another, originally used for shipping companies and railroads. Applied to aviation, it simply names a business that carries passengers or cargo by air.
Why Pilots Care
It determines which FAA regulations and safety standards apply to the flight operation.
Intuition Check
Do not read carrier as simply any aircraft carrying someone. In this FAA context, air carrier means an aviation operator that carries passengers, cargo, or mail as a business under the applicable rules.
Example Sentence 1
Major air carriers like Delta and United operate under Part 121 of the regulations.
Example Sentence 2
Air carriers must meet strict crew training and aircraft maintenance requirements.