An air carrier is a company or organization that provides air transportation services for passengers and cargo. The term 'air carrier' can refer to airlines, charter companies, and other organizations that provide air transportation services. The crossword solutions for the term 'air carrier' are TRACHEA (7 letters), HOSE (4 letters), and DUCT (4 letters). TRACHEA is a tube-like structure in the throat that carries air to the lungs. HOSE is a flexible tube used to convey liquids or gases from one place to another. DUCT is a tube or conduit used to carry air, water, or other substances from one place to another.