This is a list of aviation-related events from 1921:

Events

• Bessie Coleman attends flying school in France and became the first licensed African-American female pilot.
• Mexicana de Aviacion begins service.

June

• Boeing wins a $1,448,000 contract to build 200 Thomas-Morse MB-3 fighters for the US Army, allowing the company to abandon furniture-making.
• June 8 - the US Army carries out the first experiments in cabin pressurisation, using a de Havilland DH.4.
• June 13 - the US Army and Navy begin trials in Chesapeake Bay to test the effectiveness of aircraft in attacking ships. The captured German destroyer G-102, light cruiser Frankfurt and battleship Ostfriesland will all be successfully sunk by aerial bombing.

July

• Douglas Aircraft Company founded.